fix: Run mcp cognify and codify as background async task [COG-1647] (#655)

…t issues

<!-- .github/pull_request_template.md -->

## Description
Resolve issue with MCP timeout by switching cognify and codify to run as
background async tasks

## DCO Affirmation
I affirm that all code in every commit of this pull request conforms to
the terms of the Topoteretes Developer Certificate of Origin


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **New Features**
- Enhanced feedback messages now inform users when operations are
running in the background, providing an estimated wait time of up to 4
minutes.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

cognee-mcp/src/server.py

@@ -93,17 +93,29 @@ async def call_tools(name: str, arguments: dict) -> list[types.TextContent]:
         with open(os.devnull, "w") as fnull:
             with redirect_stdout(fnull), redirect_stderr(fnull):
                 if name == "cognify":
-                    await cognify(
-                        text=arguments["text"],
-                        graph_model_file=arguments.get("graph_model_file", None),
-                        graph_model_name=arguments.get("graph_model_name", None),
+                    asyncio.create_task(
+                        cognify(
+                            text=arguments["text"],
+                            graph_model_file=arguments.get("graph_model_file"),
+                            graph_model_name=arguments.get("graph_model_name"),
+                        )
                     )
 
-                    return [types.TextContent(type="text", text="Ingested")]
+                    return [
+                        types.TextContent(
+                            type="text",
+                            text="Background process launched due to MCP timeout limitations. Estimated completion time up to 4 minutes.",
+                        )
+                    ]
                 if name == "codify":
-                    await codify(arguments.get("repo_path"))
+                    asyncio.create_task(codify(arguments.get("repo_path")))
 
-                    return [types.TextContent(type="text", text="Indexed")]
+                    return [
+                        types.TextContent(
+                            type="text",
+                            text="Background process launched due to MCP timeout limitations. Estimated completion time up to 4 minutes.",
+                        )
+                    ]
                 elif name == "search":
                     search_results = await search(
                         arguments["search_query"], arguments["search_type"]