ship finish: a declared mechanical version retake after a base merge binds without a new review (GST-1560) (#4053)

* test: failing-first founderstar#563 retake shape, refusals and planner agreement at the cap (GST-1560)

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

* feat(ship): finish routes a declared mechanical retake with no review; --post-review plans the inserted Step 9 (GST-1560)

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

* docs(ship): mechanical_retake, ROUTE_MECHANICAL_REFUSED and the Step 16 planner line (GST-1560)

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

* test: keep ship-mechanical-retake.test.ts off the Windows scoped lane (bin shebang spawns) (GST-1560)

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

* fix: pre-landing review fixes

finish dropped a post-review path named like an Object.prototype key (constructor, toString, __proto__) from behavior through 'p in proven' on a plain object; proven is now a null-prototype map read with Object.hasOwn, with a regression test.

Review-Finding: v1/outside-voice#1 reader=outside-voice
Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>

* docs: changelog fragment prose lint (GST-1560)

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

---------

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

scripts/lib/windows-curation.ts

@@ -407,6 +407,10 @@ export const KNOWN_WINDOWS_INCOMPATIBLE: Array<{ file: string; reason: string }>
     file: 'test/ship-finish-ruled-notes.test.ts',
     reason: 'drives bin/gstack-ship-release, gstack-approvals, gstack-docs-candidate and gstack-wtree (shebangs) through test/helpers/ship-bin-fixture.ts like test/ship-rereview-triggers.test.ts; windows-latest fails every case at the first bin spawn (windows-scoped-shard, run 42139467391)',
   },
+  {
+    file: 'test/ship-mechanical-retake.test.ts',
+    reason: 'drives bin/gstack-ship-release, gstack-review-plan, gstack-ship-receipt, gstack-docs-candidate and gstack-wtree (shebangs) through test/helpers/ship-bin-fixture.ts like test/ship-finish-stack-parent.test.ts; windows-latest fails every case at the first bin spawn (windows-scoped-shard, run 42156939158)',
+  },
 ];
 
 // Force-include overrides: files a WINDOWS_FRAGILE_PATTERNS regex excludes for