ix-mcp Python sessions accept top-level await

python_eval and python_exec now run await at the top level, no asyncio.run wrapper. Each session keeps one event loop for its whole life, so an async resource created in one call is still live in the next:

python_exec(source="""
import httpx
client = httpx.AsyncClient()
r = await client.get("https://example.com")
""")
python_eval(expression="r.status_code")  # 200, same client, same loop

This is the loop that asyncio.run cannot give you: it opens and closes a fresh loop per call, so a client or pool created on one turn is bound to a loop that is already closed by the next. The worker compiles every snippet with ast.PyCF_ALLOW_TOP_LEVEL_AWAIT and drives the resulting coroutine on the kept loop, the same mechanism as CPython’s python -m asyncio REPL.

Known limitation: a coroutine that never resolves blocks the worker, exactly the way a synchronous while True already does. Bound long awaits yourself with asyncio.wait_for when you need a ceiling.