feat: unify installation model catalog

backend/test/workspace-secret-requirements.test.ts

@@ -14,7 +14,7 @@ const roots: string[] = [];
 
 function workspace(extra = "") {
   return parseWorkspaceYaml(`workspace:
-  schema_version: 3
+  schema_version: 4
   id: psd-clinical
   name: Policlinico San Donato
   language: en
@@ -23,10 +23,6 @@ dwh:
   database: postgres
   schema: datawarehouse
   supported_transports: [postgres_direct, rest_api, ssh_tunnel]
-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] }
 ${extra}`);
 }