feat: refine metadata catalog workflows

backend/src/app.ts

@@ -59,7 +59,7 @@ import { DescriptionGenerationWorker } from "./catalog/description-generation-wo
 import { SensitiveDataSuggester } from "./catalog/sensitive-data-suggester.js";
 import { SensitiveDataSuggestionRunner } from "./catalog/sensitive-data-suggestion-runner.js";
 import {
-  PostgresDescriptionSourceSampler,
+  ConcreteDescriptionSourceSampler,
   type DescriptionSourceSampler,
 } from "./catalog/description-source-sampler.js";
 import { catalogDescriptionGenerationRoutes } from "./routes/catalog-description-generation.js";
@@ -177,7 +177,7 @@ export function buildApp(config: AppConfig, deps?: BuildAppDeps): FastifyInstanc
     { connectTimeoutMs: config.workspaceDiagnosticTimeoutMs },
   );
   const descriptionSourceSampler = deps?.descriptionSourceSampler
-    ?? new PostgresDescriptionSourceSampler(catalogPostgresAccess);
+    ?? new ConcreteDescriptionSourceSampler(catalogPostgresAccess, workspaceSecretStore);
   const descriptionGenerationWorker = new DescriptionGenerationWorker(
     catalogRepository,
     workspaceRegistry,