fix(session-server): restore lock across Phase 1+2+3, preempt DELETE via cancellation channel#38

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feat/session-server-lock-restore

Commits on Jun 9, 2026

fix(session-server): restore lock across Phase 1+2+3, preempt DELETE via cancellation channel

rmfan
and
claude
committed
style: pre-commit auto-fixes (ruff + isort + black)

rmfan
and
claude
committed