fix(kanban): stop guarding respawn on PR comment URLs

[nlachica]

Summary

• Stop treating GitHub PR comment URLs in task/comment text as respawn guard liveness
• Keep respawn guard reasons limited to blocker auth, rate-limit cooldown, and recent success state
• Update Kanban docs in English and zh-Hans to match current guard reasons

Verification

• Verifier t_0e0387b5 PASS on commit 570aff683dcb689b704caffebfae950135a3a0c7
• Reviewer t_342a14fa approved docs remediation at d2037df0cd26e4ac5da14d4da342bc07ad918ba6
• scripts/run_tests.sh tests/hermes_cli/test_kanban_db.py -k 'respawn_guard' (17 passed per reviewer/verifier handoffs)
• ./venv/bin/pytest tests/hermes_cli/test_kanban_db.py (223 passed per verifier handoff)

Release gate notes

• Local branch: docs/t_c16223f1-respawn-guard
• Head SHA: d2037df0cd26e4ac5da14d4da342bc07ad918ba6
• Code change SHA verified: 570aff683dcb689b704caffebfae950135a3a0c7
• Do not merge until GitHub CI is green on this PR.

[nlachica]

Rebased the PR head onto current upstream/main (56a8e81d33a524f0ba0d68b6d54c8786ed283fb8) and pushed Ahlnos-Inc:docs/t_c16223f1-respawn-guard to 1eb03ea8da6443f13bbea08b7b8dc0c731e5f82b.

Conflict resolution: kept the approved PR-comment-URL behavior (PR URLs in task/comment prose are diagnostic only), preserved workspace_collisions, and updated the DispatchResult.respawn_guarded docstring to list blocker_auth, rate_limit_cooldown, and recent_success only.

Verification run locally:

• scripts/run_tests.sh tests/hermes_cli/test_kanban_db.py -k 'respawn_guard' — 17 passed
• scripts/run_tests.sh tests/hermes_cli/test_kanban_db.py — 223 passed
• gh pr view 61196 --repo NousResearch/hermes-agent --json headRefOid,mergeStateStatus,mergeable,statusCheckRollup — head 1eb03ea8da6443f13bbea08b7b8dc0c731e5f82b, mergeable MERGEABLE, merge state BLOCKED, checks reported: 0

[nlachica]

Closing: this was opened upstream by mistake during local Hermes/Ahlnos fork release handling. We are keeping this fix in the Ahlnos/local Hermes fork instead.