Re-port of PR #67576:
- plugins/memory/honcho/session.py: start the async writer thread lazily on
first enqueue via _ensure_async_writer (idempotent, lock-guarded) instead
of eagerly in __init__; shutdown tolerates a never-started thread
- tests/honcho_plugin/conftest.py: package-wide socket guard so no honcho
unit test can reach a live server
- tests/honcho_plugin/test_network_isolation.py: regression tests
- test_async_memory.py / test_oauth_flow.py: rebased hunks onto the pruned
suite (pruned tests not resurrected)
Salvaged-from: #67576
Co-authored-by: eapwrk <eapwrk@gmail.com>
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