feat: unify installation model catalog

backend/test/catalog-schema-routes.test.ts

@@ -16,13 +16,8 @@ const roots: string[] = [];
 afterEach(() => { for (const root of roots.splice(0)) rmSync(root, { recursive: true, force: true }); });
 
 const workspace: WorkspaceDescriptor = {
-  workspace: { schema_version: 3, id: "psd-clinical", name: "Policlinico San Donato", language: "it" },
+  workspace: { schema_version: 4, id: "psd-clinical", name: "Policlinico San Donato", language: "it" },
   dwh: { engine: "postgres", database: "warehouse", schema: "datawarehouse", port: 5432, supported_transports: ["postgres_direct"] },
-  semantic_index: {
-    vector_store: { engine: "qdrant", collection: "psd", 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 = { id: "psd-clinical", commit: "a".repeat(40), blob: "b".repeat(40), snapshotPath: "/tmp/psd.yaml" };