fix: derive PG schema from tenant ID instead of defaulting to public

Schema now defaults to tenant_${cameleer.tenant.id} (e.g. tenant_default,
tenant_acme) instead of public. Flyway create-schemas: true ensures the
schema is auto-created on first startup. CAMELEER_DB_SCHEMA env var still
available as override for feature branch isolation. Removed hardcoded
public schema from K8s base and main overlay.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

deploy/base/server.yaml

@@ -20,12 +20,8 @@ spec:
           ports:
             - containerPort: 8081
           env:
-            - name: SPRING_DATASOURCE_URL
-              value: "jdbc:postgresql://postgres.cameleer.svc.cluster.local:5432/cameleer3?currentSchema=$(CAMELEER_DB_SCHEMA)"
-            - name: SPRING_FLYWAY_URL
-              value: "jdbc:postgresql://postgres.cameleer.svc.cluster.local:5432/cameleer3?currentSchema=$(CAMELEER_DB_SCHEMA),public"
-            - name: CAMELEER_DB_SCHEMA
-              value: "public"
+            - name: CAMELEER_TENANT_ID
+              value: "default"
             - name: SPRING_DATASOURCE_USERNAME
               valueFrom:
                 secretKeyRef:

deploy/overlays/main/kustomization.yaml

@@ -38,8 +38,6 @@ patches:
             containers:
               - name: server
                 env:
-                  - name: SPRING_DATASOURCE_URL
-                    value: "jdbc:postgresql://postgres:5432/cameleer3?currentSchema=public"
                   - name: CAMELEER_UI_ORIGIN
                     value: "http://192.168.50.86:30090"
   # UI ConfigMap: production API URL