* perf(users): drop redundant get_user_by_id refetch in session-user endpoints
Five /user/* handlers refetched the user row via Users.get_user_by_id(user.id)
immediately after receiving an identical UserModel from Depends(get_verified_user).
Since get_verified_user already populated the user within the same request
microseconds earlier, the refetch is pure overhead. The dead else branches
(unreachable — get_verified_user raises 401 on missing user) are removed as
a natural consequence.
Affected endpoints:
- GET /user/settings
- GET /user/status
- POST /user/status/update
- GET /user/info
- POST /user/info/update
Eliminates one SELECT per request to each of these endpoints with no behavioral
change.
* fix(users): preserve USER_NOT_FOUND error on status update failure
update_user_status_by_id returns None when the target user is missing or
the update raises. The previous commit removed the pre-update existence
gate (get_user_by_id) and returned the update result directly, which
turned not-found/failure cases into 200 OK with a null body instead of
the expected 400 USER_NOT_FOUND.
Guard the update result explicitly to preserve the original API contract,
matching the equivalent pattern already applied in /user/info/update.
* docs(users): note lost-update tradeoff on /user/info/update
Make the concurrency tradeoff explicit: merging against the auth-time
snapshot slightly widens the lost-update window compared to the previous
pre-merge refetch, but the refetch only narrowed (did not eliminate) that
window. Real safety requires row locking or a version column.
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Co-authored-by: Claude <noreply@anthropic.com>
