pyright fixes

Author: davemssavage

src/mcp/server/fastmcp/server.py

@@ -895,9 +895,10 @@ def _convert_to_content(
         if isinstance(result, list | tuple):
             return list(
                 chain.from_iterable(
-                    _convert_to_content(item, schema) for item in result
+                    _convert_to_content(item, schema)
+                    for item in result  # type: ignore[reportUnknownVariableType]
                 )
-            )  # type: ignore[reportUnknownVariableType]
+            )
 
         if not isinstance(result, str):
             result = pydantic_core.to_json(result, fallback=str, indent=2).decode()