feat: implement TASK-WP1-01 registration transaction

tests/api/wp0-02-schema-envelope.test.ts

@@ -109,7 +109,23 @@ describe("TDD-WP0-API-001 schema envelope", () => {
   });
 
   it("accepts only the frozen error codes and details whitelist", () => {
-    expect(Object.keys(stableEngineeringErrors)).toHaveLength(10);
+    expect(Object.keys(stableEngineeringErrors).sort()).toEqual([
+      "ASSET_CLEANUP_CANDIDATE_STALE",
+      "ASSET_HISTORY_REFERENCE_CONFLICT",
+      "AUTH_SERVICE_UNAVAILABLE",
+      "AUTH_SESSION_INVALID",
+      "BROWSER_UNSUPPORTED",
+      "IDEMPOTENCY_KEY_CONFLICT",
+      "MODEL_CONFIG_VERSION_CONFLICT",
+      "MODEL_DEFAULT_REPLACEMENT_INVALID",
+      "MODEL_DEFAULT_REPLACEMENT_REQUIRED",
+      "MODEL_RECOMMENDATION_PRIORITY_CONFLICT",
+      "MODEL_RECOMMENDATION_PRIORITY_INVALID",
+      "PRIVATE_CONTENT_NOTICE_ACK_REQUIRED",
+      "REGISTRATION_REJECTED",
+      "REGISTRATION_REQUEST_INVALID",
+      "STORAGE_CAPACITY_EXCEEDED",
+    ]);
 
     const envelope = createErrorEnvelope({
       code: "MODEL_CONFIG_VERSION_CONFLICT",