fix(types): add type annotations for MyPy compliance

Add explicit type annotations to resolve MyPy type checking errors.

Changes:
- Add type annotation for JWT encode return value (str)
- Add type annotation for JWT decode return value (dict[str, Any])
- Add type annotation for get_remote_address return value (str)
- Extract retry_after with explicit type annotation

All changes ensure strict type safety without changing runtime behavior.
EOF
)

Author: Sakeeb91

app/security/auth.py

@@ -50,7 +50,7 @@ def create_access_token(
 
     to_encode.update({"exp": expire, "iat": datetime.utcnow()})
 
-    encoded_jwt = jwt.encode(
+    encoded_jwt: str = jwt.encode(
         to_encode,
         settings.security.secret_key,
         algorithm=settings.security.jwt_algorithm,
@@ -83,7 +83,7 @@ async def verify_token(
     settings = get_settings()
 
     try:
-        payload = jwt.decode(
+        payload: dict[str, Any] = jwt.decode(
             credentials.credentials,
             settings.security.secret_key,
             algorithms=[settings.security.jwt_algorithm],

app/security/rate_limiting.py

@@ -47,7 +47,8 @@ def get_rate_limit_key(request: Request) -> str:
         return f"token:{token_hash}"
 
     # Fallback to IP address
-    return get_remote_address(request)
+    ip_address: str = get_remote_address(request)
+    return ip_address
 
 
 # Initialize limiter with configuration
@@ -105,12 +106,13 @@ async def rate_limit_exceeded_handler(
         client=get_rate_limit_key(request),
     )
 
+    retry_after: str | None = exc.retry_after if hasattr(exc, "retry_after") else None
     return {
         "error": {
             "code": "RATE_LIMIT_EXCEEDED",
             "message": "Too many requests. Please try again later.",
             "details": {
-                "retry_after": exc.retry_after if hasattr(exc, "retry_after") else None,
+                "retry_after": retry_after,
             },
         }
     }