10.4
counts: Fix current_month_accumulated_count_for_user bounds.
populate_analytics_db: Create missing system group memberships.
migrations: Squash analytics migrations.
do_activate_mirror_dummy_user: Assert user_profile is a mirror dummy.
streams: Remove require_active in access_stream code path.
Create "analytics" app with activity reports.
mypy: Reenable explicit-override for models.
ruff: Fix UP007 Use `X | Y` for type annotations.