fix(#3730): quick-tasks-migrate — canonical-schema repair, auto-run on first quick (#4216)

* test(#3730): a legacy Quick Tasks table must be migratable to canonical

* fix(#3730): quick-tasks-migrate — canonical-schema repair, auto-run on first quick

* fix(#3730): review fixes — usage parity, contiguous table span, collision-safe bucket, template-width delimiter

Emitted-Drift-Ack-Growth: fast.md — #3730 runs quick-tasks-migrate before the first append (auto-migration on first quick run)
Emitted-Drift-Ack-Growth: quick.md — #3730 replaces the match-any-format note with the migration instruction

* chore(#3730): backfill changeset pr number

* fix(#3730): scope the quick-batch row-48 guard to branches touching quick-batch

---------

Co-authored-by: sim <sim@local>

tests/gsd-quick-batch-quick-regression.test.cjs

@@ -43,6 +43,22 @@ describe('quick-batch: /gsd:quick command + workflow stay byte-identical (row 48
     }
 
     const changed = resolveChangedPaths(resolved.ref);
+    // #3730 review: row 48 is the #3676 PHASE's invariant — quick-batch adds new
+    // call sites onto shared primitives without editing ordinary quick. Judging
+    // every FUTURE branch by it would freeze quick.md forever (observed: the
+    // #3730 migration note tripped this row on an unrelated branch). Scope the
+    // row to branches that actually touch the quick-batch surface; an unrelated
+    // branch's quick.md edit is none of this guard's business.
+    // tests/ excluded: this guard file's own name matches, which would make
+    // the scope check self-satisfying on every branch that edits it.
+    const touchesQuickBatch = changed.some((p) => /quick-batch/.test(p) && !p.startsWith('tests/'));
+    if (!touchesQuickBatch) {
+      t.skip(
+        `branch does not touch the quick-batch surface (${changed.length} changed paths) — ` +
+        'row 48 governs #3676-phase branches only',
+      );
+      return;
+    }
     assert.ok(
       !changed.includes('commands/gsd/quick.md'),
       'commands/gsd/quick.md must stay untouched by the #3676 quick-batch phase',