Renamed BdDaemonClient.close() cleanup method to cleanup() to eliminate
method name collision with async close(params) method for closing issues.
Root cause: Python method resolution meant the non-async close(self)
cleanup method was shadowing the async close(self, params) method that
closes issues, causing 'takes 1 positional argument but 2 were given'.
Changes:
- bd_daemon_client.py: Renamed close() -> cleanup()
- server.py: Updated cleanup code to call cleanup() instead of close()
- test_lifecycle.py: Updated tests to use cleanup()
All close-related tests pass. Fixes GitHub issue #107.
Tracked in bd-67 (closed).
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