merge: sync test and stabilize full acceptance

scripts/admin-test-env-modules/phase4-cross-region-events-contract.test.mjs

@@ -47,7 +47,7 @@ function context(resources = {}) {
       if (token === this.overseasToken) return response(path, null, 403, 'A0403')
       if (path.includes('/overview')) return response(path, { container: {
         id: '3001', containerNo: 'MSCU1234567', unloadingCompletedAt: '2026-08-24T10:00:00Z',
-        unloadingPhotoUploadedAt: '2026-08-24T09:00:00Z', estimatedEmptyReportedAt: '2026-08-26T09:00:00Z',
+        unloadingPhotoUploadedAt: '2026-08-24T09:00:00Z', estimatedEmptyReportedAt: '2026-08-27T10:00:00Z',
         actualEmptyReportedAt: null, emptyReportSourceVersion: 7,
       } })
       return response(path, { records: [{ container: { id: '3001', containerNo: 'MSCU1234567' } }] })
@@ -103,6 +103,13 @@ test('cross-region producers do not repeat the destructive A0 snapshot mutation'
   assert.match(fixtureCall, /preparePhase3LoadingFixture\('', false\)/)
 })
 
+test('tail controls receive their own completed producer matrix before they consume it', async () => {
+  const entry = await import('node:fs/promises').then((fs) => fs.readFile(
+    new URL('../admin-test-env-acceptance.mjs', import.meta.url), 'utf8'))
+  assert.match(entry, /module === 'phase4-tail-order-controls' \|\| module === 'phase4-overseas-pda'/)
+  assert.match(entry, /await this\.ensurePhase4PdaProducerMatrix\(\)/)
+})
+
 test('contract covers dual audience, canonical 403, both event directions and diagnostics', () => {
   for (const token of [
     'context.token)', 'context.overseasToken)', 'cn-overseas-event-not-delivered',