Add ORM tables models

[Timelessprod]

Add SqlAlchemy ORM classes for 2 tables:

• vehicles:

  • id: UUID
  • trip_id: STRING
  • line_product: ENUM(bus, subway, tram, suburban, ferry, express, regional)
  • line_name: STRING
  • partition_dt: DATE

• vehicle_positions:

  • vehicle_id: FOREIGN KEY on Vehicle
  • timestamp: TIMESTAMP
  • latitude: DECIMAL
  • longitude: DECIMAL
  • partition_dt: DATE

Both tables should be partitioned by day on the partition_dt column and have relationships to enable back population and cascade deletions.