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/core/algorithms.py

@@ -89,6 +89,8 @@ class TokenBucketAlgorithm(BaseAlgorithm):
                 remaining=int(tokens),
                 reset_at=now + self.window_size,
                 window_size=self.window_size,
+            retry_after = (1 - tokens) / self.refill_rate
+
             )
 
         tokens = float(state.get("tokens", self.burst_size))