v1.92.54.0 ship-queue: train land takes the shared land lock; verify proves the stamp; restamp stages its writes (#3599, #3531) (#3737)

* feat(ship): pause /ship on a red base instead of failing (gstack-base-red, conditional receipts) (GSTA-157 PR 1)

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* fix: base-red shell runner launches bash through runBashSync

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* test: base-red coverage additions (unreproduced head, unresolved head, readPause, wait unconfigured)

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* docs: base-red pause in unattended endings; BASE_RED_UNCONFIGURED covers an invalid base policy

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* test: base-red coverage pass 2 (write --base-red, summary line, classify usage before fetch, unresolved-head detail)

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* feat(ship-queue): merge trains for any repo — train.gates (workflows/command), every prefix gated, generalized train land (direct/update, merge method), base-red trains, train init/doctor, watch --land (GSTA-157 PR 2)

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* fix: pre-landing review fixes (train gates: dispatch bound, lease, rebase, post-merge checks, output tail, caps)

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* fix: train land refuses the next slot until the previous slot's post-merge checks are green

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* docs: ship-policy, troubleshooting and captain for train gates review fixes

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* chore: changelog fragment for merge trains for any repo

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* test: keep ship-queue-train-generic out of the Windows subset (gh shim resolves gh.exe there)

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* fix(ship-queue): train land takes the shared land lock (train-scoped, freeze-owned), verify --train proves the stamp and needs GitHub MERGED, restamp stages its writes (#3599, #3531)

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* fix: pre-landing review fixes (train keeps the land lock through a mid-train refusal; freeze takeover reads the notes ref; a refused lock push is not reported as a taken lock)

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* fix: a freeze lock is taken over only on a freeze record cleared after it (pre-landing review pass 2)

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* fix: a stale restamp staging marker is dropped, not a failure; a failed dry run refuses before the real run; settleLock names the real lock-write failure (Step 11 review)

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* fix(ship-queue): land takes over a cleared freeze lock; deleted lock ref reads absent; unread verify head refuses QUEUE_PROOF_MISSING

Step 11 adversarial findings on PR #3737: a freeze lock whose release push failed
blocked every standalone land after its freeze cleared (freezeLockCleared shared by
land and train land takeover); readLock kept a cached ref deleted on origin; verify
--train --no-fetch judged the unstamped pin; the slot call now restores the worktree
for an unrequested fifth file.

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* chore(changelog): name the fragment after the branch slug

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* docs(captain): the slot restamp stages the stamp files it wrote

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* docs(ship-queue): verify --train refuses QUEUE_PROOF_MISSING on an unread head

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---------

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scripts/lib/windows-curation.ts

@@ -315,6 +315,10 @@ export const KNOWN_WINDOWS_INCOMPATIBLE: Array<{ file: string; reason: string }>
     file: 'test/ship-queue-train-land.test.ts',
     reason: 'drives train land against test/helpers/ship-queue-train-fixture.ts plus an extensionless node gh wrapper on a colon-joined PATH; on windows-latest spawnSync(\'gh\') resolves the runner\'s gh.exe instead, as for test/ship-queue-train.test.ts and test/ship-queue-land.test.ts (windows-free-shard 6, run 40824965988)',
   },
+  {
+    file: 'test/ship-queue-land-lock.test.ts',
+    reason: 'drives land and train land against test/helpers/ship-queue-train-fixture.ts plus an extensionless node gh wrapper on a colon-joined PATH; on windows-latest spawnSync(\'gh\') resolves the runner\'s gh.exe instead, as for test/ship-queue-train-land.test.ts and test/ship-queue-land.test.ts (windows-free-shard 6, run 40824965988)',
+  },
   {
     file: 'test/ship-queue-train.test.ts',
     reason: 'drives bin/gstack-ship-queue against the stateful #!/bin/sh gh shim in test/helpers/ship-queue-train-fixture.ts; on windows-latest spawnSync(\'gh\') resolves the runner\'s gh.exe instead of the shim (windows-free-shard run 39152702056)',