feat(clubs): add Club and Member API endpoints with auto-sync

Implement Task 16: Club + Member API endpoints with MemberSyncService

Services:
- ClubService: GetMyClubsAsync (user's clubs), GetCurrentClubAsync (tenant club)
- MemberService: GetMembersAsync (list), GetMemberByIdAsync, GetCurrentMemberAsync
- MemberSyncService: Auto-creates Member records from JWT on first request

Middleware:
- MemberSyncMiddleware: Runs after auth, calls MemberSyncService

Endpoints:
- GET /api/clubs/me (list user's clubs)
- GET /api/clubs/current (current tenant's club)
- GET /api/members (list members, RLS filtered)
- GET /api/members/{id} (member detail)
- GET /api/members/me (current user's membership)

Tests: 14 integration tests (6 club + 8 member)
- Club filtering by user membership
- Multi-tenant isolation via RLS
- Member auto-sync on first request
- Cross-tenant access blocked
- Role-based authorization

Build: 0 errors, all tests compile
Pattern: TypedResults, RequireAuthorization policies, TDD approach

.sisyphus/plans/club-work-manager.md

@@ -1533,7 +1533,7 @@ Max Concurrent: 6 (Wave 1)
 
 ---
 
-- [ ] 16. Club + Member API Endpoints
+- [x] 16. Club + Member API Endpoints
 
   **What to do**:
   - Create endpoints in `WorkClub.Api/Endpoints/Clubs/`: