feat: deploy to Frostmoln production (#1019)

Moves the production deploy from AWS to the Frostmoln production cluster (namespace `schemas`).

- `deploy-prod` (AWS) has failed since CI left AWS (no `k8s.unbound.se` context on the runners). It's replaced by `deploy-prod-frostmoln`, as in unbound-site/lingonpaj-site: `deploy prod-frostmoln -n schemas` with the org's `FROSTMOLN_PRODUCTION_DEPLOY_KEY`, `FROSTMOLN_PRODUCTION_CLUSTER_ID` and `BUILDTOOLS_FROSTMOLN_PRODUCTION`.
- Restricted Pod Security: the image runs as `node` (uid 1000) with a matching securityContext. The service only writes under `/tmp` (cosmo composition).
- `secrets.yaml` (AWS ClusterSecretStore, RDS + CloudAMQP) → `secrets-prod-frostmoln.yaml`: the namespace's `frostmoln` SecretStore and the Frostmoln Secret `schemas` (`POSTGRES_URL`, `AMQP_URL`, `API_KEY`), written by infra's `seed-schemas.sh`. The file had no target suffix, so it applied to every target.
- `config-prod`/`pdb-prod` → `-prod-frostmoln`; the ALB ingress → a Traefik one for `/query` with a Let's Encrypt certificate.

Checked locally (amd64): runs as uid 1000 with all capabilities dropped, `wgc` works, `/tmp` writable; it fails only on the (dummy) database, as expected.

**Merge after** infra#1878 is applied and `seed-schemas.sh` + `migrate-schemas-db.sh` have run. `schemas.unbound.se` keeps pointing at AWS until the cut-over.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

https://claude.ai/code/session_01Ma8eHhW59hLAJuLzBnLvUu
Reviewed-on: #1019

k8s/deploy.yaml

@@ -26,6 +26,11 @@ spec:
       labels:
         app.kubernetes.io/name: schemas
     spec:
+      securityContext:
+        runAsNonRoot: true
+        runAsUser: 1000
+        seccompProfile:
+          type: RuntimeDefault
       affinity:
         podAntiAffinity:
           preferredDuringSchedulingIgnoredDuringExecution:
@@ -40,6 +45,10 @@ spec:
               topologyKey: kubernetes.io/hostname
       containers:
       - name: schemas
+        securityContext:
+          allowPrivilegeEscalation: false
+          capabilities:
+            drop: ["ALL"]
         resources:
           requests:
             cpu: "100m"

k8s/ingress-prod-frostmoln.yaml

@@ -0,0 +1,20 @@
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: schemas
+  annotations:
+    traefik.ingress.kubernetes.io/router.entrypoints: websecure
+    traefik.ingress.kubernetes.io/router.tls.certresolver: letsencrypt
+spec:
+  ingressClassName: traefik
+  rules:
+  - host: "schemas.unbound.se"
+    http:
+      paths:
+      - path: /query
+        pathType: Prefix
+        backend:
+          service:
+            name: schemas
+            port:
+              name: api

k8s/ingress-prod.yaml

@@ -1,24 +0,0 @@
-apiVersion: networking.k8s.io/v1
-kind: Ingress
-metadata:
-  name: schemas-ingress
-  annotations:
-    alb.ingress.kubernetes.io/group.name: "default"
-    alb.ingress.kubernetes.io/scheme: internet-facing
-    alb.ingress.kubernetes.io/target-type: instance
-    alb.ingress.kubernetes.io/listen-ports: '[{"HTTP": 80},{"HTTPS": 443}]'
-    alb.ingress.kubernetes.io/ssl-redirect: "443"
-    alb.ingress.kubernetes.io/healthcheck-path: '/health'
-spec:
-  ingressClassName: "alb"
-  rules:
-  - host: "schemas.unbound.se"
-    http:
-      paths:
-      - path: /query
-        pathType: ImplementationSpecific
-        backend:
-          service:
-            name: schemas
-            port:
-              name: api

k8s/secrets-prod-frostmoln.yaml

@@ -0,0 +1,17 @@
+apiVersion: external-secrets.io/v1
+kind: ExternalSecret
+metadata:
+  name: schemas
+spec:
+  refreshInterval: 1h
+  # The namespace's store (infra frostmoln/production/schemas.tf); the
+  # Frostmoln Secret holds POSTGRES_URL, AMQP_URL and API_KEY
+  # (infra frostmoln/production/scripts/seed-schemas.sh).
+  secretStoreRef:
+    name: frostmoln
+    kind: SecretStore
+  target:
+    name: schemas
+  dataFrom:
+  - extract:
+      key: schemas

k8s/secrets.yaml

@@ -1,24 +0,0 @@
-apiVersion: external-secrets.io/v1
-kind: ExternalSecret
-metadata:
-  name: schemas
-spec:
-  refreshInterval: 1h
-  secretStoreRef:
-    name: external-secrets
-    kind: ClusterSecretStore
-  target:
-    creationPolicy: Owner
-    template:
-      mergePolicy: Merge
-      engineVersion: 'v2'
-      data:
-        POSTGRES_URL: "postgres://{{ .DB_USERNAME }}:{{ .DB_PASSWORD }}@{{ .DB_HOST }}:{{ .DB_PORT }}/schemas?sslmode=disable"
-        API_KEY: "{{ .API_KEY }}"
-  dataFrom:
-  - extract:
-      key: services/schemas
-  - extract:
-      key: rds/postgres/prod-psql
-  - extract:
-      key: mq/rabbit/prod