Waypoint Reservation System , Reservation Management, Queue-Based Repositioning

Key Changes Made:

1. Waypoint Reservation System

· Added WaypointReservation class to track which AI car occupies each waypoint

· Thread-safe using lock (reservationLock) for concurrent access

· Reservations have timestamps and expiration logic to prevent deadlocks

2. Reservation Management

· ReserveWaypoint(): Attempts to reserve a waypoint for this AI car

· ReleaseWaypoint(): Releases a specific waypoint reservation

· IsWaypointAvailable(): Checks if a waypoint can be used

· Automatic cleanup of expired/invalid reservations via CleanupExpiredReservationsCoroutine()

3. Queue-Based Repositioning

· RepositionAICarWithQueue(): New coroutine that searches for free waypoints

· Searches forward (for missed waypoints) or backward (for stuck situations)

· Waits up to maxWaitTimeForWaypoint seconds before forcing a waypoint

· Prevents multiple AI cars from spawning at the same waypoint simultaneously

4. Automatic Waypoint Tracking

· When an AI car progresses to a new waypoint, it automatically releases the old one and reserves the new one

· Handles OnDisable/OnDestroy to clean up reservations when cars are removed

5. Configurable Parameters

· maxWaitTimeForWaypoint: How long to wait for a free waypoint (default 5s)

· reservationTimeout: How long reservations are valid before expiring (default 15s)

This system ensures AI cars won't collide during repositioning and prevents all cars from spawning at the same waypoint!