Journaling for all flights

backend/app/models/journal.py

@@ -0,0 +1,33 @@
+from sqlalchemy import Column, BigInteger, String, Text, DateTime, Index, func
+from datetime import datetime
+from enum import Enum as PyEnum
+from app.db.session import Base
+
+
+class EntityType(str, PyEnum):
+    """Entity types that can have journal entries"""
+    PPR = "PPR"
+    LOCAL_FLIGHT = "LOCAL_FLIGHT"
+    ARRIVAL = "ARRIVAL"
+    DEPARTURE = "DEPARTURE"
+
+
+class JournalEntry(Base):
+    """
+    Generic journal table for tracking changes across all entity types.
+    Replaces the PPR-specific journal table.
+    """
+    __tablename__ = "journal"
+    
+    id = Column(BigInteger, primary_key=True, autoincrement=True)
+    entity_type = Column(String(50), nullable=False, index=True)  # PPR, LOCAL_FLIGHT, ARRIVAL, DEPARTURE
+    entity_id = Column(BigInteger, nullable=False, index=True)  # ID of the entity
+    entry = Column(Text, nullable=False)
+    user = Column(String(50), nullable=False, index=True)
+    ip = Column(String(45), nullable=True)  # Made optional for new entries
+    entry_dt = Column(DateTime, nullable=False, server_default=func.current_timestamp(), index=True)
+    
+    # Composite index for efficient queries
+    __table_args__ = (
+        Index('idx_entity_lookup', 'entity_type', 'entity_id'),
+    )