feat: sincronizar scaffold completo del shape web-backend/python

Sincroniza el scaffold canónico desde templates/web-backend-python/ del
repo IDP. Reemplaza el placeholder mínimo previo (.gitea/workflows/ci.yaml,
README.md, .gitignore, catalog-info.yaml) por el scaffold completo
documentado en ADR-053 §3:

- code/ — FastAPI app con /health (db check), /metrics, /demo estático,
  middleware correlation_id, settings Pydantic, db.py con SQLAlchemy
- code/alembic/ — migración inicial vacía + env.py usando MIGRATION_DATABASE_URL
- code/tests/ — pytest + httpx TestClient (test_health, test_demo)
- helm/APP_NAME/ — chart con Deployment, Service, IngressRoute Traefik,
  NetworkPolicy, ServiceMonitor, Job alembic-upgrade como hook
  pre-upgrade,pre-install (backoffLimit: 0)
- coralware-shape.yaml — manifiesto v1alpha1 del contrato del shape
- claim-mariadb.yaml — AddonClaim declarativo (uso futuro ADR-052)
- catalog-info.yaml — entidad Backstage actualizada
- .gitea/workflows/APP_NAME-build.yaml — invoca reusable workflow ADR-038
  + job helm-deploy con KUBECONFIG_TENANT_B64

Placeholders __APP_NAME__, __TIER__, __TENANT_ID__, __TENANT_ID_NODASHES__
serán sustituidos server-side por repo-provisioner cuando materialice el
template para un tenant (pendiente — ADR-053 §11.5).

El openspec/ del golden path NO se sincroniza al repo Gitea (gobernanza
interna de Coralware).

Refs: ADR-052, ADR-053, poc-nexobms.md (PoC NexoBMS Demetrio).

helm/APP_NAME/templates/_helpers.tpl

@@ -0,0 +1,32 @@
+{{/*
+Labels comunes a todos los recursos del chart.
+Sigue convenciones CLAUDE.md global + IDP (idp.coralware.cloud/*).
+*/}}
+{{- define "app.labels" -}}
+app.kubernetes.io/name: {{ .Chart.Name }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+app.kubernetes.io/part-of: {{ .Chart.Name }}
+idp.coralware.cloud/tier: {{ .Values.tier | quote }}
+idp.coralware.cloud/tenant-id: {{ .Values.tenantId | quote }}
+idp.coralware.cloud/golden-path: {{ .Values.goldenPath }}
+idp.coralware.cloud/golden-path-lang: {{ .Values.goldenPathLang }}
+{{- end }}
+
+{{/*
+Selector labels — subset estable de app.labels usado en Deployment.spec.selector
+y Service.spec.selector. NO debe incluir labels que cambien (version, tier).
+*/}}
+{{- define "app.selectorLabels" -}}
+app.kubernetes.io/name: {{ .Chart.Name }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+{{- end }}
+
+{{/*
+Checksum del Secret de la BD — fuerza rollout cuando rota el secret.
+*/}}
+{{- define "app.dbSecretChecksum" -}}
+{{- $secret := lookup "v1" "Secret" .Release.Namespace .Values.database.secretName }}
+{{- if $secret }}{{ toYaml $secret.data | sha256sum }}{{ else }}absent{{ end }}
+{{- end }}

helm/APP_NAME/templates/deployment.yaml

@@ -0,0 +1,87 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ .Release.Name }}
+  labels:
+    {{- include "app.labels" . | nindent 4 }}
+spec:
+  replicas: {{ .Values.replicaCount }}
+  selector:
+    matchLabels:
+      {{- include "app.selectorLabels" . | nindent 6 }}
+  template:
+    metadata:
+      labels:
+        {{- include "app.labels" . | nindent 8 }}
+      annotations:
+        checksum/db-secret: {{ include "app.dbSecretChecksum" . }}
+    spec:
+      serviceAccountName: {{ .Release.Name }}
+      imagePullSecrets:
+        - name: {{ .Values.image.pullSecret }}
+      securityContext:
+        runAsNonRoot: true
+        runAsUser: 1001
+        seccompProfile:
+          type: RuntimeDefault
+      containers:
+        - name: app
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
+          ports:
+            - name: http
+              containerPort: 8000
+              protocol: TCP
+          envFrom:
+            - secretRef:
+                name: {{ .Values.database.secretName }}
+            - configMapRef:
+                name: {{ .Release.Name }}-config
+          env:
+            - name: STATIC_DEMO_PATH
+              value: {{ .Values.config.staticDemoPath | quote }}
+          livenessProbe:
+            httpGet:
+              path: /health
+              port: http
+            initialDelaySeconds: {{ .Values.probes.liveness.initialDelaySeconds }}
+            periodSeconds: {{ .Values.probes.liveness.periodSeconds }}
+          readinessProbe:
+            httpGet:
+              path: /health
+              port: http
+            initialDelaySeconds: {{ .Values.probes.readiness.initialDelaySeconds }}
+            periodSeconds: {{ .Values.probes.readiness.periodSeconds }}
+            failureThreshold: {{ .Values.probes.readiness.failureThreshold }}
+          resources:
+            {{- toYaml .Values.resources | nindent 12 }}
+          securityContext:
+            allowPrivilegeEscalation: false
+            readOnlyRootFilesystem: true
+            capabilities:
+              drop: ["ALL"]
+          volumeMounts:
+            - name: tmp
+              mountPath: /tmp
+      volumes:
+        - name: tmp
+          emptyDir: {}
+---
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: {{ .Release.Name }}
+  labels:
+    {{- include "app.labels" . | nindent 4 }}
+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ .Release.Name }}-config
+  labels:
+    {{- include "app.labels" . | nindent 4 }}
+data:
+  LOG_LEVEL: {{ .Values.config.logLevel | quote }}
+  CORRELATION_ID_HEADER: {{ .Values.config.correlationIdHeader | quote }}
+  OPENAPI_REQUIRE_AUTH: {{ .Values.config.openapiRequireAuth | quote }}
+  KEYCLOAK_ISSUER: {{ .Values.config.keycloakIssuer | quote }}

helm/APP_NAME/templates/ingressroute.yaml

@@ -0,0 +1,19 @@
+{{- if .Values.ingress.enabled }}
+apiVersion: traefik.io/v1alpha1
+kind: IngressRoute
+metadata:
+  name: {{ .Release.Name }}
+  labels:
+    {{- include "app.labels" . | nindent 4 }}
+spec:
+  entryPoints:
+    - websecure
+  routes:
+    - match: Host(`{{ .Values.ingress.host }}`)
+      kind: Rule
+      services:
+        - name: {{ .Release.Name }}
+          port: {{ .Values.service.port }}
+  tls:
+    secretName: {{ .Values.ingress.tlsSecretName }}
+{{- end }}

helm/APP_NAME/templates/job-alembic-upgrade.yaml

@@ -0,0 +1,59 @@
+{{- if .Values.alembic.enabled }}
+# Job pre-upgrade que corre Alembic antes de rolar el Deployment.
+# - backoffLimit: 0  → si falla, NO reintenta; Helm aborta el upgrade.
+# - hook-delete-policy hook-succeeded → solo se borra al éxito; en fallo queda
+#   visible para `kubectl logs job/...` y diagnóstico.
+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: {{ .Release.Name }}-alembic-{{ .Release.Revision }}
+  labels:
+    {{- include "app.labels" . | nindent 4 }}
+  annotations:
+    "helm.sh/hook": pre-upgrade,pre-install
+    "helm.sh/hook-weight": "0"
+    "helm.sh/hook-delete-policy": before-hook-creation,hook-succeeded
+spec:
+  backoffLimit: 0
+  ttlSecondsAfterFinished: 600
+  template:
+    metadata:
+      labels:
+        {{- include "app.labels" . | nindent 8 }}
+    spec:
+      restartPolicy: Never
+      serviceAccountName: {{ .Release.Name }}
+      imagePullSecrets:
+        - name: {{ .Values.image.pullSecret }}
+      securityContext:
+        runAsNonRoot: true
+        runAsUser: 1001
+      containers:
+        - name: alembic
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
+          command: {{ .Values.alembic.command | toJson }}
+          envFrom:
+            - secretRef:
+                name: {{ .Values.database.secretName }}
+          env:
+            # Si el Secret expone MIGRATION_DATABASE_URL, lo usa; si no, env.py
+            # cae a DATABASE_URL automáticamente (ver settings.migration_url).
+            - name: DATABASE_URL
+              valueFrom:
+                secretKeyRef:
+                  name: {{ .Values.database.secretName }}
+                  key: DATABASE_URL
+            - name: MIGRATION_DATABASE_URL
+              valueFrom:
+                secretKeyRef:
+                  name: {{ .Values.database.secretName }}
+                  key: MIGRATION_DATABASE_URL
+                  optional: true
+          resources:
+            {{- toYaml .Values.alembic.resources | nindent 12 }}
+          securityContext:
+            allowPrivilegeEscalation: false
+            readOnlyRootFilesystem: true
+            capabilities:
+              drop: ["ALL"]
+{{- end }}

helm/APP_NAME/templates/networkpolicy.yaml

@@ -0,0 +1,66 @@
+{{- if .Values.networkPolicy.enabled }}
+# NetworkPolicy mínima del shape: bajo deny-all-default del namespace, permite:
+# - Ingress: Traefik (web-backend público) + Prometheus (scrape de /metrics).
+# - Egress: DNS, Harbor (pull en startup), ns-addons del tenant (BD).
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: {{ .Release.Name }}
+  labels:
+    {{- include "app.labels" . | nindent 4 }}
+spec:
+  podSelector:
+    matchLabels:
+      {{- include "app.selectorLabels" . | nindent 6 }}
+  policyTypes: [Ingress, Egress]
+
+  ingress:
+    # Tráfico HTTP desde Traefik (IngressRoute)
+    - from:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: traefik-system
+      ports:
+        - protocol: TCP
+          port: 8000
+    # Scrape de métricas Prometheus
+    - from:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: cattle-monitoring-system
+          podSelector:
+            matchLabels:
+              app.kubernetes.io/name: prometheus
+      ports:
+        - protocol: TCP
+          port: 8000
+
+  egress:
+    # DNS
+    - to:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: kube-system
+      ports:
+        - protocol: UDP
+          port: 53
+        - protocol: TCP
+          port: 53
+    # ns-addons del tenant: MariaDB primary + pool
+    - to:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: {{ .Values.networkPolicy.addonsNamespace }}
+      ports:
+        - protocol: TCP
+          port: 3306
+        - protocol: TCP
+          port: 6033
+    # Harbor pull (registro de imágenes)
+    - to:
+        - ipBlock:
+            cidr: 0.0.0.0/0
+      ports:
+        - protocol: TCP
+          port: 443
+{{- end }}

helm/APP_NAME/templates/service.yaml

@@ -0,0 +1,15 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ .Release.Name }}
+  labels:
+    {{- include "app.labels" . | nindent 4 }}
+spec:
+  type: {{ .Values.service.type }}
+  selector:
+    {{- include "app.selectorLabels" . | nindent 4 }}
+  ports:
+    - name: http
+      port: {{ .Values.service.port }}
+      targetPort: http
+      protocol: TCP

helm/APP_NAME/templates/servicemonitor.yaml

@@ -0,0 +1,16 @@
+{{- if .Values.serviceMonitor.enabled }}
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  name: {{ .Release.Name }}
+  labels:
+    {{- include "app.labels" . | nindent 4 }}
+spec:
+  selector:
+    matchLabels:
+      {{- include "app.selectorLabels" . | nindent 6 }}
+  endpoints:
+    - port: {{ .Values.serviceMonitor.port }}
+      interval: {{ .Values.serviceMonitor.interval }}
+      path: /metrics
+{{- end }}