🧪 test: fix BDD step registration and update CI/CD workflow

- Fix step pattern escaping in pkg/bdd/steps/steps.go:80
- Update CI/CD workflow to use run-bdd-tests.sh script
- Enhance run-bdd-tests.sh for both local and CI environments
- Add strict validation for undefined/pending/skipped steps
- Update BDD testing documentation with pattern requirements

The CI/CD pipeline now properly validates BDD tests and fails on any
undefined, pending, or skipped steps. All 22 BDD scenarios are passing
with correct step pattern registration.

.gitea/workflows/ci-cd.yaml

@@ -183,10 +183,24 @@ jobs:
             exit 1
           fi
 
-      - name: Run tests with coverage
+      - name: Run BDD tests with strict validation
         run: |
-          echo "Running tests with PostgreSQL service..."
-          go test ./... -coverprofile=coverage.out -v && go tool cover -func=coverage.out > coverage.txt
+          echo "Running BDD tests with strict validation..."
+          # Use the run-bdd-tests.sh script which fails on undefined/pending steps
+          # In CI environment, PostgreSQL is already running as a service
+          export DLC_DATABASE_HOST=postgres
+          export DLC_DATABASE_PORT=5432
+          export DLC_DATABASE_USER=postgres
+          export DLC_DATABASE_PASSWORD=postgres
+          export DLC_DATABASE_NAME=dance_lessons_coach_bdd_test
+          export DLC_DATABASE_SSL_MODE=disable
+          ./scripts/run-bdd-tests.sh
+
+      - name: Run unit tests with coverage
+        run: |
+          echo "Running unit tests with PostgreSQL service..."
+          # Run unit tests excluding BDD tests (already run above)
+          go test ./pkg/... ./cmd/... -coverprofile=coverage.out -v && go tool cover -func=coverage.out > coverage.txt
           
           # Extract coverage percentage
           COVERAGE=$(grep "total:" coverage.txt | grep -oP '\d+\.\d+' | head -1)