Store command in database when using MCP run_task tool

The MCP server was not storing the command in the queue database,
while the CLI (tq.py) was. This caused the prism plugin to fall back
to showing just task counts instead of the actual command being run.

- Add command parameter to wait_for_turn function
- Include command in INSERT statement
- Pass command from run_task to wait_for_turn

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: mttmcknn

task_queue.py

@@ -231,7 +231,7 @@ def get_memory_mb() -> float:
 
 
 # --- Core Queue Logic ---
-async def wait_for_turn(queue_name: str) -> int:
+async def wait_for_turn(queue_name: str, command: str | None = None) -> int:
     """Register task, wait for turn, return task ID when acquired."""
     # Ensure database exists and is valid
     ensure_db()
@@ -250,8 +250,8 @@ async def wait_for_turn(queue_name: str) -> int:
 
     with get_db() as conn:
         cursor = conn.execute(
-            "INSERT INTO queue (queue_name, status, pid, server_id) VALUES (?, ?, ?, ?)",
-            (queue_name, "waiting", my_pid, SERVER_INSTANCE_ID),
+            "INSERT INTO queue (queue_name, status, pid, server_id, command) VALUES (?, ?, ?, ?, ?)",
+            (queue_name, "waiting", my_pid, SERVER_INSTANCE_ID, command),
         )
         task_id = cursor.lastrowid
 
@@ -440,7 +440,7 @@ async def run_task(
                 key, value = pair.split("=", 1)
                 env[key.strip()] = value.strip()
 
-    task_id = await wait_for_turn(queue_name)
+    task_id = await wait_for_turn(queue_name, command)
     mem_before = get_memory_mb()
 
     start = time.time()