Add grouping option to progress summary and fix type annotations

[tboerstad]

This PR makes the following changes:

1. Added 'groupbyactivities' parameter to get_progress_summary_between_dates()

   • Allows control over grouping by activity type
   • Defaults to True for backwards compatibility

2. Updated type annotations:

   • get_devices() now returns List[Dict[str, Any]]
   • get_device_alarms() returns List[Any]
   • cdate in add_hydration_data() is now explicitly Optional

3. Minor code cleanup:

   • Reorganized imports
   • Adjusted some function signatures

Tested:

• get_progress_summary_between_dates with groupbyactivities=False
• make format/lint/codespell

Please review and provide feedback.

[cyberjunky]

Thank you, nice work!