fix: gate workspace diagnostic migration

backend/test/workspaces-contracts.test.ts

@@ -5,7 +5,7 @@ import { type CanonicalWorkspace, parseWorkspaceYaml } from "../src/workspaces/s
 import { renderRuntimeConfig, type RuntimeBindings } from "../src/workspaces/runtime-renderer.js";
 
 const validWorkspace = parseWorkspaceYaml(`workspace:
-  schema_version: 1
+  schema_version: 2
   id: psd-clinical
   name: Policlinico San Donato
   language: it
@@ -74,7 +74,7 @@ test("renders English UI headings and workspace-language Italian prose", () => {
 
 test("renders the vector store identity and creates writer credentials only when declared", () => {
   const writerWorkspace = parseWorkspaceYaml(`workspace:
-  schema_version: 1
+  schema_version: 2
   id: psd-clinical
   name: Policlinico San Donato
   language: it
@@ -82,7 +82,7 @@ dwh:
   engine: postgres
   database: warehouse
   schema: datawarehouse
-  supported_transports: [postgres_direct]
+  supported_transports: [postgres_direct, rest_api]
 semantic_index:
   vector_store:
     engine: pgvector
@@ -91,7 +91,7 @@ semantic_index:
     collection: clinical_documents
     dimensions: 768
     distance: cosine
-    supported_transports: [pgvector_direct]
+    supported_transports: [pgvector_direct, rest_api]
   vector_writer: {}
   embedding:
     provider: ollama_compatible