ActionLogFindAsync Method
Finds the user action log entries in the specified range, optionally
matching a username or ID
Entries logged before the configured partitioned-search cutover (see
"actionLog:partitionedSearchCutover", default 2026-07-01) only have the legacy
descending-hour row, so any part of dateRange before the cutover
is searched with the legacy unscoped scan; any part at or after the cutover is
searched using the ID or user-name accelerator partition when one is supplied.