mysql-mcp-server: startup self-test crashes the first real query with "bound to a different event loop"

RuntimeError: <aiorwlock._RWLockCore object at 0x...> is bound to a different event loop

Traceback (most recent call last):
  File "asyncmy_pool_connection.py", line 227, in check_expiry
    async with self.rw_lock.reader_lock:
  File "aiorwlock/__init__.py", line 218, in __aenter__
    await self.acquire()
  File "aiorwlock/__init__.py", line 245, in acquire
    await self._lock.acquire_read()
  File "aiorwlock/__init__.py", line 64, in _get_loop
    raise RuntimeError(f"{self!r} is bound to a different event loop")

import asyncio, sys, types

fake = types.ModuleType("asyncmy")
class FakePool:
    def acquire(self):
        raise AssertionError("not reached")
async def fake_create_pool(**kw):
    return FakePool()
fake.create_pool = fake_create_pool
fake.Pool = FakePool
fake_cursors = types.ModuleType("asyncmy.cursors")
fake_cursors.DictCursor = object
fake.cursors = fake_cursors
sys.modules["asyncmy"] = fake
sys.modules["asyncmy.cursors"] = fake_cursors

from awslabs.mysql_mcp_server.connection.asyncmy_pool_connection import AsyncmyPoolConnection

conn = AsyncmyPoolConnection(
    host="db.example.internal", port=3306, database="app", readonly=True,
    secret_arn="", db_user="", region="us-east-1", is_iam_auth=False, is_test=True,
)

asyncio.run(conn.check_expiry())     # mirrors main()'s startup self-test asyncio.run(run_query(...))
asyncio.run(conn.check_expiry())     # mirrors mcp.run() serving on a fresh loop -> crashes here