feat: Phase 5 — Module Ingest + WebSocket STOMP

Phase 5 — Module Ingest (cœur du système) + WebSocket STOMP

• IngestPayloadRequest — DTO d'entrée GPS
• VehicleStatusService — calcul MOVING/IDLE/PARKED
• TripDetectionService — détection trajet ignition ON/OFF + gap 30 min + Haversine
• AlertDetectionService — mapping eventIoId → AlertType (guard eventIoId=0)
• IngestService — orchestrateur 8 étapes
• IngestController — POST /api/v1/ingest (ROLE_SERVICE)
• WebSocketConfig — STOMP /ws + SockJS
• TrackingBroadcastService — broadcast /topic/fleet et /topic/alerts
• HaversineUtil — calcul distance
• CHANGELOG.md mis à jour