fix: harden workspace diagnostics probes

backend/src/app.ts

@@ -16,6 +16,7 @@ import { createPiModelLister } from "./pi/list-models.js";
 import { loadSettings, saveSettings, type Settings } from "./settings/settings-store.js";
 import { ReadinessManager } from "./runtime/readiness-manager.js";
 import { WorkspaceRegistry } from "./workspaces/registry.js";
+import { createProductionWorkspaceDiagnoser } from "./workspaces/diagnostics.js";
 
 export interface BuildAppDeps {
   thtRunner?: ThtRunner;
@@ -53,6 +54,10 @@ export function buildApp(config: AppConfig, deps?: BuildAppDeps): FastifyInstanc
   // dependencies on the same registry lifecycle without performing Git I/O at startup.
   const workspaceRegistry = deps?.workspaceRegistry ?? new WorkspaceRegistry(config.workspaceRegistry);
   void workspaceRegistry;
+  // Task 6 consumes this dependency from the registry route. Construct it from the effective
+  // application configuration here so production diagnostics never silently use test defaults.
+  const workspaceDiagnoser = createProductionWorkspaceDiagnoser(config.workspaceDiagnosticTimeoutMs);
+  void workspaceDiagnoser;
   const readiness = deps?.readiness ?? new ReadinessManager(
     tht as ThtRunner,
     Math.round(config.ollamaEnsureTimeoutMs / 1000),