feat: unify installation model catalog

backend/test/routes-workspaces.test.ts

@@ -14,7 +14,7 @@ import type { AuthDiagnoser, AuthDiagnostics } from "../src/auth/diagnostics.js"
 
 const workspace: CanonicalWorkspace = {
   workspace: {
-    schema_version: 3,
+    schema_version: 4,
     id: "psd-clinical",
     name: "Policlinico San Donato",
     description: "Clinical analytics workspace",
@@ -26,20 +26,6 @@ const workspace: CanonicalWorkspace = {
     schema: "datawarehouse",
     supported_transports: ["postgres_direct"],
   },
-  semantic_index: {
-    vector_store: {
-      engine: "qdrant",
-      collection: "psd-clinical",
-      dimensions: 1024,
-      distance: "cosine",
-    },
-    embedding: {
-      provider: "ollama_internal",
-      model: "qwen3-embedding:0.6b",
-      dimensions: 1024,
-    },
-  },
-  llm_policy: { allowed: ["zai/glm-5.2"] },
 };
 
 const revision: WorkspaceRevision = {
@@ -194,7 +180,7 @@ test("lists workspace summaries and reads a validated immutable workspace", asyn
   expect(read.json()).toEqual({ workspace, revision });
 });
 
-test("validates a schema v3 workspace without mutating the repository", async () => {
+test("validates a schema v4 workspace without mutating the repository", async () => {
   const app = appFor(registryFake());
 
   const response = await app.inject({
@@ -284,7 +270,7 @@ test.each([1, 2])("rejects schema v%s at the validation boundary with a sanitize
   expect(response.body).not.toMatch(/migration_required|schema version/i);
 });
 
-test("runs diagnostics for a schema v3 workspace", async () => {
+test("runs diagnostics for a schema v4 workspace", async () => {
   const diagnose = vi.fn(async () => ({ activatable: true, diagnostics: [] }));
   const app = appFor(registryFake(), diagnose);