Major WIP state machine

backend/app/models/arrival.py

@@ -14,6 +14,8 @@ class SubmissionSource(str, Enum):
 class ArrivalStatus(str, Enum):
     BOOKED_IN = "BOOKED_IN"
     LANDED = "LANDED"
+    GROUND = "GROUND"
+    ARRIVED = "ARRIVED"
     CANCELLED = "CANCELLED"
 
 
@@ -31,6 +33,7 @@ class Arrival(Base):
     created_dt = Column(DateTime, server_default=func.now(), nullable=False, index=True)
     eta = Column(DateTime, nullable=True, index=True)
     landed_dt = Column(DateTime, nullable=True)
+    arrived_dt = Column(DateTime, nullable=True)  # Time when aircraft parks and shuts down
     created_by = Column(String(16), nullable=True, index=True)
     submitted_via = Column(SQLEnum(SubmissionSource), nullable=False, default=SubmissionSource.ADMIN, index=True)
     pilot_email = Column(String(128), nullable=True)  # For public submissions