chore(sso): remove deprecated crove-sso Cloudflare Worker

.github/copilot-instructions.md

@@ -11,7 +11,6 @@
 - `apps/backend`: NestJS REST API Gateway, Controllers, OAuth & Webhook endpoints.
 - `apps/frontend`: Next.js 16 (App Router) + React 19 + Tailwind CSS 3 UI.
 - `apps/orchestrator`: Temporal Worker for scheduled posting workflows and background activities.
-- `apps/crove-sso`: Cloudflare Worker SSO bridge (optional edge fallback).
 - `libraries/nestjs-libraries`: Database layer (Prisma), 34+ Social Providers, Email, Notifications, Mastra MCP Server.
 - `libraries/helpers`: Runtime branding engine, Fetch wrappers, Subdomain management, Auth helper utilities.
 - `libraries/react-shared-libraries`: Reusable React components, translations, UI forms.

.github/workflows/build.yml

@@ -78,9 +78,6 @@ jobs:
       - name: Validate Beta deployment script and compose contract
         run: pnpm run validate:beta-deploy
 
-      - name: Test SSO Worker (vitest)
-        run: pnpm run test:sso
-
       # The suites drive the real Prisma client, so the schema must exist in
       # the throwaway database first. --skip-generate because the postinstall
       # hook already generated the client. No --accept-data-loss: this is an