merge v1.2.6#135

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M09Ic wants to merge 3 commits intomasterfrom

fix/channel-close-panic

Commits on Mar 6, 2026

fix: prevent send-on-closed-channel panic and baseline invalid on raw parse failure

M09Ic
and
claude
committed
fix: use ctx as unified shutdown signal to prevent channel close panics

M09Ic
and
claude
committed
ci: add pool shutdown regression tests and PR CI workflow

M09Ic
and
claude
committed