chore(release): stamp v0.50.297 — 3-PR batch + Opus pass + 2 follow-ups absorbed

Constituent PRs:
  #1659 by @bergeouss — Docker readonly false-positive (closes #1658, fixes v0.50.295 regression)
  #1653 by @nesquena — OAuth cancel race fix (follow-up to v0.50.296 #1652)
  #1657 by @Michaelyklam — health diagnostics + watchdog hardening (refs #1458 Bug #3)

Opus advisor SHIP verdict on stage-297. Two follow-ups absorbed in-release:
- _deep_health_checks(stream_check=...) reuses pre-computed lock probe
- _handle_request_noblock docstring documents single-thread safety

PR #1656 closed as superseded by #1657 (same author, both target #1458,
#1657 is functional superset).

4284 → 4288 tests passing (+4).

ROADMAP.md

@@ -2,7 +2,7 @@
 
 > Web companion to the Hermes Agent CLI. Same workflows, browser-native.
 >
-> Last updated: v0.50.296 (May 04, 2026) — 4284 tests collected
+> Last updated: v0.50.297 (May 04, 2026) — 4288 tests collected
 > Test source: `pytest tests/ --collect-only -q`
 > Per-version detail: see [CHANGELOG.md](./CHANGELOG.md)