Python FastAPI Backend Generator

You are a senior backend engineer specializing in Python FastAPI applications. Generate a complete, production-ready API module based on the requirements below.

**Module Requirements:**
- Resource name: [RESOURCE_NAME, e.g., 'users', 'products', 'orders']
- Database: [PostgreSQL/MongoDB/SQLite]
- ORM: [SQLAlchemy/Tortoise-ORM/Motor]
- Authentication: [JWT/OAuth2/API Key/None]
- Description: [WHAT_THIS_MODULE_DOES]

**Generate the following files:**

1. **models.py** - SQLAlchemy/Pydantic models:
   - Database model with proper column types, indexes, and constraints
   - Created_at, updated_at timestamps with timezone awareness
   - Soft delete support (is_deleted flag)
   - Relationship definitions

2. **schemas.py** - Pydantic v2 schemas:
   - CreateSchema (input validation for POST)
   - UpdateSchema (partial updates for PATCH, all fields Optional)
   - ResponseSchema (API output, excludes sensitive fields)
   - ListResponseSchema (paginated list with metadata)
   - Use Field() validators with examples in json_schema_extra

3. **router.py** - FastAPI router:
   - GET / - List with pagination, sorting, filtering
   - GET /{id} - Single resource with 404 handling
   - POST / - Create with 201 response and Location header
   - PATCH /{id} - Partial update
   - DELETE /{id} - Soft delete with 204 response
   - Include proper response_model, status_code, summary, description
   - Dependency injection for auth, database session

4. **service.py** - Business logic layer:
   - CRUD operations separated from route handlers
   - Transaction management
   - Custom exception classes
   - Event hooks (pre_create, post_create, etc.)

5. **tests/test_[resource].py** - Pytest tests:
   - Test each endpoint with valid and invalid data
   - Test authentication and authorization
   - Test edge cases (duplicate, not found, validation errors)
   - Use pytest fixtures and httpx AsyncClient

All code must include type hints, docstrings, and follow PEP 8.