Vadym Samoilenko 2245a12829 fix: case-insensitive Microsoft user lookup to prevent duplicate key error ... Microsoft can return different email casings for the same user (e.g. VadymSamoilenko@... vs vadymsamoilenko@...). The previous case-sensitive find_one would miss the existing user, then fail on insert_one with a duplicate key error on the _id field (ms-{sub[:20]}). Fix: look up by _id first (deterministic from Microsoft sub), then fall back to case-insensitive email regex for local-to-Microsoft migrations. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>		2026-03-20 10:42:58 +00:00
..
v1	fix: case-insensitive Microsoft user lookup to prevent duplicate key error	2026-03-20 10:42:58 +00:00