v1.51.0

What's Changed

• chore: sync version 1.50.0 to staging by @rapiercraft-forgedock[bot] in #5160
• fix(conformance): reviewer misquote of an acceptance criterion ends the lane needs-human (#5164) by @rapiercraft-forgedock[bot] in #5169
• fix(review-staging): delivery check lists comments once per reviewer, no retry — listing lag fails delivered panels (#5166) by @rapiercraft-forgedock[bot] in #5170
• fix: NEG_GAP stops bare negators at "to"/"for"/etc, so "We do not need to run e2e; mocked route tests cover it" and "will not rely on e2e, mock the API" are no longer flagged by weakenedE2eDecisions ( (review finding — PR #5155) (#5157) by @rapiercraft-forgedock[bot] in #5171
• fix: Per-request bearer resolution runs the sync keychain lookup (secret-tool/security, 10s timeout) on every HTTP call when token_env is set but absent from env (router/token_file fallback case); mai (review finding — PR #5155) (#5159) by @rapiercraft-forgedock[bot] in #5172
• fix(orchestrate): transient model-gateway 502 ends lanes engine-error after one zero-delay relaunch (#5161) by @rapiercraft-forgedock[bot] in #5173
• fix(orchestrate): --requeue refuses engine-error; expired-login lanes burn their relaunch and trip the breaker (#5168) by @rapiercraft-forgedock[bot] in #5176
• fix(pool): router picks the Claude login with longest validity, ignoring usage — exhausted accounts defer batches (#5165) by @rapiercraft-forgedock[bot] in #5175
• fix(lean): delivered work closed as NOT_PLANNED (partial-merge, already-fixed, decomposed parent) — reads as dropped scope and strands dependents (#5152) by @rapiercraft-forgedock[bot] in #5178
• follow-up: 1 deferred item(s) (deferred from #5152) (#5177) by @rapiercraft-forgedock[bot] in #5179
• fix(orchestrate): failed root skips its subtree as 'dependency cycle' instead of holding it (#5162) by @rapiercraft-forgedock[bot] in #5180
• feat(orchestrate): early batch-health alert — batches that fail in the first hour go unnoticed (#5167) by @rapiercraft-forgedock[bot] in #5182
• Release 1.51.0: batch-health alert, close reasons, failed-root holds, login-failure deferral, pool login by usage by @rapiercraft-forgedock[bot] in #5183

Full Changelog: v1.50.0...v1.51.0