feat: Initialize logging in all worker entry points

feat: Add notification calls and increase offer expiry time

fix: resolve final critical gaps (N1, N2, N3, N4)

fix: resolve remaining high/medium production gaps (R1, H4, H5, M8, M12, L5)

fix: resolve critical and high production gaps in booking allocation engine

Update worker implementations and add notification service

fix: resolve 4 critical production gaps in booking allocation engine

Initial commit: Booking Allocation Engine with complete documentation