v1.94.17.0 ci-carry: guard carry, jobs-mapped lanes, aliases, per-file carry of runner-skipped files, path-skipped jobs (GST-1186, GST-1189, GST-1190) (#3929)

* feat(pregate): a guard that already passed at this tree carries from CI or the ledger (GST-1186)

Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>

* feat(ci-carry): jobs-mapped lanes, aliases, narrow-lane counts, --simulate proof, policy-base check on carried (GST-1189, GST-1190)

Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>

* fix(ci-carry): a file whose every test skipped on CI is not carried; tree.json records skipped_files (GST-1190)

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* feat(ci-carry): path-skipped jobs count only under an unchanged gate; find --policy-from head --simulate (GST-1190)

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* ship: name the pre-push guards in Step 17 and the early push (moved from #3923 per GSTA-258)

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* ci-carry: per-file lane carry for runner-skipped files; review fixes (gate inputs, passed ignores CI rows, simulate consent, pull_request-only skips, guard not-owed)

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* ship: Step 17 names the pre-push guards without a code this branch cannot print

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* pregate: gstack's bun run test lane runs its runner-skipped files with per_file

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* ci-carry: a per_file remainder must run tests here and the carried runs must still stand (l6c-p2)

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* ci-carry: read record-ci from its own last record line; the remainder's count must come from this run's row (l6c-p2 red-team)

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* test(ci-tree-reuse): type the skipped_files fixture for the test typecheck ratchet

Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>

* Revert "pregate: gstack's bun run test lane runs its runner-skipped files with per_file"

This reverts commit fafbae5b9b.

* ci-carry: ship the skipped_files reader inert; gstack's writer and per_file move to the adoption PR; Step 17 keeps its refs/heads marker

Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>

* docs: guard carry, per_file and the too-old message in pregate and troubleshooting (docs audit l6cdocs2)

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* gstack-evidence record-ci: recheck the working tree after the post-remainder run recheck (#3929 second fix-check)

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* windows-curation: exclude test/ship-ci-carry.test.ts like its ship-bin-fixture siblings (the path-scoped Windows check runs it at its first spawn)

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---------

Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>

scripts/lib/windows-curation.ts

@@ -388,6 +388,10 @@ export const KNOWN_WINDOWS_INCOMPATIBLE: Array<{ file: string; reason: string }>
     file: 'test/ship-release.test.ts',
     reason: 'spawns bin/gstack-ship-release (shebang) directly and writes #!/bin/sh gh stubs through test/helpers/ship-bin-fixture.ts; windows-latest exits before the bin runs (windows-free-shard 3, run 41073592483)',
   },
+  {
+    file: 'test/ship-ci-carry.test.ts',
+    reason: 'drives bin/gstack-ship-release, gstack-evidence, gstack-ci-carry and gstack-pregate (shebangs) through test/helpers/ship-bin-fixture.ts like test/ship-release.test.ts; windows-latest fails every bin case at the first spawn (windows-scoped-shard, run 41607840098)',
+  },
   {
     file: 'test/ship-rereview-triggers.test.ts',
     reason: 'drives bin/gstack-ship-release, gstack-docs-candidate and gstack-wtree (shebangs) through test/helpers/ship-bin-fixture.ts like test/ship-release.test.ts; windows-latest fails every bin case at the first spawn (windows-free-shard 6, run 41193336209)',