docs(buglog,specs): bug-1957 fixed (367af11a); time-window and host-failure briefs reuse the graceful kill

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

.kiro/specs/host-failure-job-recovery/brief.md

@@ -89,3 +89,8 @@ that kills jobs whose attempt number is stale.
 - HA/persistence: full 3-phase workflow; additive Cap'n Proto; the new facts
   round-trip through WAL and snapshot (`/xce-audit-invariants`).
 - The timer must never block the delaymgr (`ha-async-io.md`).
+
+**Update 2026-10-10 (bug-1957):** killing a job's stale copy or a job being
+requeued should use the worker's graceful termination (LSF TERMINATE action:
+SIGINT, SIGTERM, SIGKILL with `job.terminate_interval`), as LSF's `brequeue`
+does, rather than an immediate SIGKILL.

.kiro/specs/job-time-window/brief.md

@@ -266,3 +266,11 @@ backstop.
   enforce the deadline too; the helper timer covers it.
 - TDD: `testsuite/` first, then `_test.go`. ASAN must be clean.
 - HA/persistence touch: use the full 3-phase workflow.
+
+**Update 2026-10-10 (bug-1957):** the worker now has a shared graceful
+termination: a job-control kill with `grace > 0` runs LSF's TERMINATE action
+(SIGINT, SIGTERM, SIGKILL, one grace period apart, stopping as soon as the
+job is gone; `job_signal_seq_*`, `src/worker/src/job_signal.c`), with the
+cluster default `job.terminate_interval` (10 s). The end-time kill should
+reuse it (sequence and interval) instead of its own SIGTERM → grace →
+SIGKILL helper described above.