feat: consolidate 26 tools into 10 tools with 90 actions

Refactor the entire tool layer to use the consolidated action pattern
(action: Literal[...] with QUERIES/MUTATIONS dicts). This reduces LLM
context from ~12k to ~5k tokens while adding ~60 new API capabilities.

New tools: unraid_info (19 actions), unraid_array (12), unraid_notifications (9),
unraid_users (8), unraid_keys (5). Rewritten: unraid_docker (15), unraid_vm (9),
unraid_storage (6), unraid_rclone (4), unraid_health (3).

Includes 129 tests across 10 test files, code review fixes for 16 issues
(severity ordering, PrefixedID regex, sensitive var redaction, etc.).

Removes tools/system.py (replaced by tools/info.py). Version bumped to 0.2.0.

unraid_mcp/main.py

@@ -5,6 +5,17 @@ This is the main entry point for the Unraid MCP Server. It imports and starts
 the modular server implementation from unraid_mcp.server.
 """
 
+import asyncio
+
+
+async def shutdown_cleanup() -> None:
+    """Cleanup resources on server shutdown."""
+    try:
+        from .core.client import close_http_client
+        await close_http_client()
+    except Exception as e:
+        print(f"Error during cleanup: {e}")
+
 
 def main() -> None:
     """Main entry point for the Unraid MCP Server."""
@@ -13,8 +24,18 @@ def main() -> None:
         run_server()
     except KeyboardInterrupt:
         print("\nServer stopped by user")
+        try:
+            asyncio.run(shutdown_cleanup())
+        except RuntimeError:
+            # Event loop already closed, skip cleanup
+            pass
     except Exception as e:
         print(f"Server failed to start: {e}")
+        try:
+            asyncio.run(shutdown_cleanup())
+        except RuntimeError:
+            # Event loop already closed, skip cleanup
+            pass
         raise