feat: member portal Sprint 10 — Knowledge Base

- KnowledgeBoard + KnowledgeItem models + migration (DRAFT/PUBLISHED/ARCHIVED status, slug per tenant)
- KnowledgeModule: admin CRUD for boards + items (auto-slug, status workflow)
- Member endpoint GET /my/knowledge?q= — published items grouped by board, optional text search over question/answer
- /my/knowledge page: search box + collapsible boards with accordion FAQ items
- KnowledgeItem accordion + KnowledgeSearch (debounced URL-driven) client components
- Knowledge nav item; register KnowledgeModule

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/api/src/modules/knowledge/knowledge.module.ts

@@ -0,0 +1,12 @@
+import { Module } from '@nestjs/common';
+import { KnowledgeController } from './knowledge.controller';
+import { KnowledgeService } from './knowledge.service';
+import { AuthModule } from '../auth/auth.module';
+
+@Module({
+  imports: [AuthModule],
+  controllers: [KnowledgeController],
+  providers: [KnowledgeService],
+  exports: [KnowledgeService],
+})
+export class KnowledgeModule {}