Creates a complete reservation system for freelance coaches and individuals
booking pool lanes or session cards. Includes:
- 3-step wizard (booker info → package selection → confirmation)
- Overflow handling when participant count exceeds lane capacity
- Reservations create real sa_groups records for Mirror grid integration
- Session tracking (used/remaining) with manual + automatic decrement
- Payment request integration with cashier module
- List view with search/filter and detail view with progress tracker

New tables: sa_pool_reservations, sa_groups.source_type/pool_reservation_id
New programs: SWIM-LANE-RENTAL, SWIM-CARDS (program_type='rental')
Updated pricing in sa_academy_pricing for lanes and cards
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>