Revert to typing_extensions.TypedDict for Pydantic compatibility

Pydantic requires typing_extensions.TypedDict on Python < 3.12.
Docker container uses Python 3.11, so this is necessary.

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

Co-Authored-By: Claude <noreply@anthropic.com>

mcp_server/pyproject.toml

@@ -10,6 +10,7 @@ dependencies = [
     "graphiti-core[falkordb]>=0.23.0",
     "pydantic-settings>=2.0.0",
     "pyyaml>=6.0",
+    "typing-extensions>=4.0.0",
 ]
 
 [project.optional-dependencies]

mcp_server/src/models/response_types.py

@@ -1,6 +1,8 @@
 """Response type definitions for Graphiti MCP Server."""
 
-from typing import Any, TypedDict
+from typing import Any
+
+from typing_extensions import TypedDict
 
 
 class ErrorResponse(TypedDict):