Add Series 3+ behavior tracking support

[adamjacobmuller]

Summary

• Adds comprehensive behavior tracking support for Series 3+ TryFi collars
• Syncs all behavior-related changes from the embedded pytryfi in hass-tryfi
• Fixes NoneType parsing errors that prevented behavior data from displaying

Changes

New Functionality

• Added getPetHealthTrends function to query behavior data from TryFi API
• Added updateBehaviorStats method to FiPet for fetching behavior metrics
• Added setBehaviorStatsFromTrends method for parsing behavior data
• Added _parseTimelineSegments method for extracting timeline events
• Added 30 behavior properties (5 behaviors × 2 metrics × 3 time periods):
  • Barking, Licking, Scratching, Eating, Drinking
  • Count and Duration metrics
  • Daily, Weekly, Monthly time periods
• Added behaviorTimeline property for behavior event history

Bug Fixes

• Fixed NoneType error when eventsSummary is None
• Fixed NoneType error when durationSummary is None
• Added proper initialization of _name attribute in FiPet constructor
• Added comprehensive error handling for GraphQL queries and mutations

Testing

• Added test_behavior.py with comprehensive tests for all behavior functionality
• Verified all 30 behavior properties work correctly
• Tested NoneType handling to ensure no crashes
• Confirmed timeline parsing extracts events properly

Related Issues

This brings feature parity with the embedded pytryfi in the hass-tryfi Home Assistant integration, enabling Series 3+ collar users to access behavior tracking data.

Test Results

✓ FiPet created successfully
✓ All 30 behavior properties exist and default to 0
✓ setBehaviorStatsFromTrends correctly parses event counts and durations
✓ Timeline events are extracted properly
✓ None/null values are handled gracefully without errors
✓ All methods exist and are callable
✓ getPetHealthTrends function is available