chore(crm): remove the AI agent — service-ai is an enterprise capability (#2319)

Mirror the showcase change (#2317): the open-source CRM example shouldn't define
an AI agent that requires the enterprise @objectstack/service-ai runtime.

- delete src/agents/ (SalesAssistantAgent + DealManagementSkill + LookupContactTool)
  and its config wiring (agents / skills) plus the unused referenceMetadata export;
- remove the @objectstack/service-ai dependency (added in #2311 to back the agent).

crm now boots as a Community-Edition shape: no AI service registered, discovery
reports services.ai unavailable, /api/v1/ai/agents 404. tsc --noEmit + all 29 crm
tests pass.

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

Author: os-zhuang

examples/app-crm/objectstack.config.ts

@@ -13,11 +13,6 @@ import * as actions from './src/actions/index.js';
 import * as emails from './src/emails/index.js';
 import { allHooks } from './src/hooks/index.js';
 import { allFlows } from './src/flows/index.js';
-import {
-  SalesAssistantAgent,
-  LookupContactTool,
-  DealManagementSkill,
-} from './src/agents/index.js';
 import {
   SalesRepRole,
   SalesManagerRole,
@@ -136,19 +131,6 @@ export default defineStack({
   // Integrations
   connectors: [HubSpotConnector, SlackConnector],
 
-  // AI
-  agents: [SalesAssistantAgent],
-  skills: [DealManagementSkill],
-
   // Seed data
   data: CrmSeedData,
 });
-
-/**
- * Reference templates for metadata types not (yet) wired into a
- * top-level defineStack collection. The Studio metadata-admin UI
- * can copy from these when authoring.
- */
-export const referenceMetadata = {
-  tools: [LookupContactTool],
-};

examples/app-crm/package.json

@@ -20,7 +20,6 @@
   },
   "dependencies": {
     "@objectstack/runtime": "workspace:*",
-    "@objectstack/service-ai": "workspace:*",
     "@objectstack/spec": "workspace:*"
   },
   "devDependencies": {