refactor: improve config loader validation with Pydantic schemas

- Replace manual field type validation with Pydantic model schemas
- Add pydantic>=2.0 as core dependency
- Fix sync wrapper in decorator to properly handle rate limiting
- Update pyright settings for stricter type checking
- Fix repository URL in pyproject.toml
- Remove unused main.py
- Update test assertions for new validation error format

fastapi_traffic/__init__.py

@@ -20,7 +20,7 @@ from fastapi_traffic.exceptions import (
     RateLimitExceeded,
 )
 
-__version__ = "0.1.0"
+__version__ = "0.2.0"
 __all__ = [
     "Algorithm",
     "Backend",