Implement AnimalMoved event handling:
- Update AnimalRegistryProjection for move events
- Update IntervalProjection to close/open location intervals
- Update EventAnimalsProjection to link move events to animals
- Add move_animals() to AnimalService with validations
Validations include:
- Destination location must exist and be active
- All animals must be from a single location
- Cannot move to the same location as current
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Implements Step 3.3: Animal Cohort Creation
- Add AnimalRegistryProjection for animal_registry and live_animals_by_location
- Add EventAnimalsProjection for event_animals link table
- Add IntervalProjection for location and attribute intervals
- Add AnimalService with create_cohort() for coordinating event + projections
- Add seeded_db fixture to conftest.py
- Update projections/__init__.py with new exports
All operations atomic within single transaction. Includes validation for
location (exists, active) and species (exists, active).
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
