feat: enhance error handling and configuration in backend

- Added ORCID_REDIRECT_URI to docker-compose for OAuth callback.
- Refactored CORS and trusted hosts settings in configuration for better clarity.
- Introduced a new function to validate publication IDs and provide explicit error messages for researcher IDs.
- Updated rate limiting strategy to simplify configuration.
- Improved security headers middleware to safely remove sensitive headers.

backend/app/core/rate_limit.py

@@ -39,8 +39,8 @@ def _build_limiter() -> Limiter:
         key_func=_key_func,
         default_limits=[settings.RATE_LIMIT_DEFAULT],
         storage_uri=storage_uri,
-        headers_enabled=True,
-        strategy="fixed-window-elastic-expiry",
+        headers_enabled=False,
+        strategy="fixed-window",
     )