feat(core-cms): register audit-logs + wire GDPR audit erasure

The audit-logs collection was never registered (record() would throw),
bindAudit/createAuditErasureHook were unused, and DSR cascade-hard never
touched the audit trail (audit finding A6). core-cms now registers the
collection and wires a req-scoped afterDelete erasure hook on users;
bindAllProduction binds the audit log into consent/DSR; cascade-hard
pseudonymizes the subject's audit entries; the action select accepts
the full AuditAction enum so consent/DSR entries pass validation.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

packages/core-cms/src/payload.config.ts

@@ -8,7 +8,11 @@ import {
   withRetentionTombstone,
   buildRetentionPurgeTask,
 } from "@repo/core-shared/payload";
-import { users } from "@repo/auth/cms";
+import {
+  auditLogsCollection,
+  createReqScopedAuditErasureHook,
+} from "@repo/core-audit";
+import { users as usersBase } from "@repo/auth/cms";
 import { articles } from "@repo/blog/cms";
 import { media } from "@repo/media/cms";
 import { pages, siteSettings } from "@repo/marketing-pages/cms";
@@ -17,10 +21,28 @@ import { header } from "@repo/navigation/cms";
 const filename = fileURLToPath(import.meta.url);
 const dirname = path.dirname(filename);
 
+// GDPR audit erasure (audit finding A6): when a users row is hard-deleted
+// (admin expunge, DSR cascade-hard, retention purge), pseudonymize that
+// subject's audit-log entries so the trail keeps its shape without PII linkage.
+const users = {
+  ...usersBase,
+  hooks: {
+    ...usersBase.hooks,
+    afterDelete: [
+      ...(usersBase.hooks?.afterDelete ?? []),
+      createReqScopedAuditErasureHook(),
+    ],
+  },
+};
+
 // Collections declaring custom.retention.postDeletion get the soft-delete
 // tombstone field (`deletedAt`) so the DSR soft delete can stamp rows and the
 // retention purge job can grace-purge them (audit finding A2).
-const collections = [users, articles, pages, media].map(withRetentionTombstone);
+const collections = [
+  ...[users, articles, pages, media].map(withRetentionTombstone),
+  // Local audit sink (A6) — required for PayloadAuditLog.record() to work.
+  auditLogsCollection,
+];
 
 export default buildConfig({
   editor: lexicalEditor(),