Update v1 meeting field names and data types to align with real v1 data

Updated field names to match v1 schema:
- id → uid
- topic → title
- agenda → description
- meeting_id → meeting_uid
- committee → committee_uid
- filters → allowed_voting_statuses
- meeting_and_occurrence_id → past_meeting_uid (for some objects)

Changed numeric values from strings to integers:
- repeat_interval, type, monthly_week, monthly_week_day
- early_join_time, duration
- file_size values for recordings/transcripts
- recording_count
- AverageAttendance

Updated access_update playbooks to send only required fields instead of
copying entire data objects. Fixed all !ref references to use updated
field names.

Added artifact_visibility field to meeting objects.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Signed-off-by: Andres Tobon <andrest2455@gmail.com>

Author: andrest50