Complete phase G4: Membership Services
- UserService: RequestClubMembership (by ID, name, invite token),
ApproveMembership, RejectMembership, GetPendingMemberships
- ClubService: CreateInvitation, GetInvitationByToken, ValidateInvitation,
IncrementInvitationUsage, GetInvitationsByClub, GetByName
- Add PendingMembershipDto, ClubInvitationDto, CreateClubInvitationDto
- Update tests to pass AppDbContext to ClubService
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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