ci: optimize build + deploy + migrate workflows

- build.yaml: merge 3 cargo steps into single compile pass (reuse artifacts)
- build.yaml: remove cargo clean (wasted compiled artifacts before Docker)
- build.yaml: add secret validation for registry credentials
- deploy.yaml: skip checkout, fetch SHA via Gitea API (no clone overhead)
- deploy.yaml: reuse FORGEJO_REGISTRY_TOKEN for API auth (existing privilege)
- deploy.yaml: validate SHA image exists before tagging as latest
- deploy.yaml: add secret validation for registry credentials
- migrate.yaml: merge schema verification into both changed + manual paths
- migrate.yaml: manual trigger now fails on first error (was silently masking)

.gitea/workflows/migrate.yaml

@@ -31,7 +31,7 @@ jobs:
           echo "Changed migrations: $CHANGED"
           echo "CHANGED_MIGRATIONS=$CHANGED" >> $GITHUB_ENV
 
-      - name: Run migrations
+      - name: Run changed migrations and verify schema
         if: env.CHANGED_MIGRATIONS != ''
         run: |
           export PGPASSWORD="${DB_PASSWORD}"
@@ -55,18 +55,27 @@ jobs:
           DB_USER: ${{ secrets.DB_USER }}
           DB_PASSWORD: ${{ secrets.DB_PASSWORD }}
 
-      - name: Run all migrations (manual trigger)
+      - name: Run all migrations and verify schema (manual trigger)
         if: github.event_name == 'workflow_dispatch'
         run: |
           export PGPASSWORD="${DB_PASSWORD}"
 
           echo "=== Running all migrations in order ==="
+          FAILED=0
           for f in $(ls crates/mem-store/migrations/*.sql | sort); do
             echo "--- Applying: $f ---"
-            psql -h "$DB_HOST" -p "$DB_PORT" -U "$DB_USER" -d "$DB_NAME" -f "$f" 2>&1 || true
-            echo "--- Done: $f ---"
+            if ! psql -h "$DB_HOST" -p "$DB_PORT" -U "$DB_USER" -d "$DB_NAME" -f "$f" 2>&1; then
+              echo "ERROR: Migration $f failed!"
+              FAILED=1
+            else
+              echo "--- OK: $f ---"
+            fi
           done
 
+          if [ $FAILED -eq 1 ]; then
+            exit 1
+          fi
+
           echo "=== Final schema ==="
           psql -h "$DB_HOST" -p "$DB_PORT" -U "$DB_USER" -d "$DB_NAME" -c "\dt memory*"
           psql -h "$DB_HOST" -p "$DB_PORT" -U "$DB_USER" -d "$DB_NAME" -c "\d memory_entity"