docs(devlog): bugfix 848 — PR 861 CI diagnosis, resolved (060)

Author: jun

devlog/_plan/260802_bugfix_280/060_fix_848_pr861_unblock.md

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+# 060 — #848: PR #861 macOS CI diagnosis (resolved at research time)
+
+Diagnosis (investigator Laplace, verified): the macOS CI failure on PR
+#861 is the known Bun-on-macOS isolate segfault, not a PR defect.
+
+- Failing job: run 30710653575 (`bun test --isolate`), crashed in
+  tests/storage-worker-lifecycle.test.ts with `panic: Segmentation fault`,
+  no JS stack, exit 133.
+- Ancestry: PR head f6d7d1cf does NOT contain #849 (18352b4f,
+  macos-isolate-worker-segfault); the failed CI merge used base aae9426e,
+  predating #849.
+
+Action taken 2026-08-02: posted the diagnosis + exact unblock action on
+#861 (comment 5154392437): rebase `fix/848-bun-runtime-provenance` onto
+current dev (past 18352b4f) and let CI rerun; review is otherwise complete
+on the maintainer side.
+
+Outcome: DONE — no local code change needed; the issue's fix rides PR
+#861 once rebased.