* fix: make email lookup case-insensitive in get_user_by_email
Email addresses are case-insensitive in practice, but get_user_by_email
compared with an exact `UserModel.email == email` predicate. A user who
signed up as "User@example.com" could not be found when logging in as
"user@example.com" (and vice-versa), so the same person could fail to log
in — or be treated as a brand-new account — depending only on how their
client capitalized the address.
Compare on `func.lower(UserModel.email) == func.lower(email)` so lookups
are robust to capitalization. Minimal and backwards-compatible: it works
with existing mixed-case rows immediately, with no migration required.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* fix: enforce case-insensitive user emails
---------
Co-authored-by: developer603 <vrramsolutions@gmail.com>
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Co-authored-by: Abhishek Kumar <abhishek@a6k.me>
