fix: restore specific type annotations per review feedback

Keep EnumSymbol and str types instead of Any for better type safety.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: cfsmp3

database.py

@@ -190,13 +190,13 @@ def copy(self, **kwargs: Any) -> DeclEnumType:
         """Get enumeration type of self."""
         return DeclEnumType(self.enum)
 
-    def process_bind_param(self, value: Optional[Any], dialect: Dialect) -> Optional[str]:
+    def process_bind_param(self, value: Optional[EnumSymbol], dialect: Dialect) -> Optional[str]:
         """Get process bind parameter."""
         if value is None:
             return None
         return value.value
 
-    def process_result_value(self, value: Optional[Any], dialect: Dialect) -> Optional[EnumSymbol]:
+    def process_result_value(self, value: Optional[str], dialect: Dialect) -> Optional[EnumSymbol]:
         """Get process result value."""
         if value is None:
             return None