v1.5.4: test infrastructure + bug fixes + CI/CD + deploy gate

- 6 new test files: route discovery, strict permissions, role switch,
  CRUD operations, 500 error protection
- permission_config.py: central permission definitions for all 110+ routes
- Bug fixes: is_active checkbox in users_edit, int(id) 500 crash,
  missing validation in users_create/users_delete
- Pre-commit hooks: lint + static routing tests
- GitHub Actions CI: full pytest suite on push
- Deploy gate: pytest runs before deploy, aborts on failure
- All 3 deploy scripts: --skip-tests flag support

.pre-commit-config.yaml

@@ -0,0 +1,15 @@
+repos:
+  - repo: local
+    hooks:
+      - id: pytest-routes
+        name: pytest (route definition check)
+        description: Verify all routes are defined and covered in permission_config
+        entry: pytest py_service/tests/test_routes_defined.py py_service/tests/test_00_discover_routes.py -v --no-header -q
+        language: system
+        pass_filenames: false
+        always_run: true
+      - id: ruff
+        name: ruff linter
+        entry: ruff check py_service/
+        language: system
+        pass_filenames: false