Auth flows

[yahyafakhroji]

Part of: datum-cloud/enhancements#755

Summary

Build the user-facing authentication flows on top of the provider integration — everything a user goes through to sign in, sign up, and secure their account — matching the current login experience on the new stack.

Scope

• Sign-in and password.
• Registration, password reset, and account verification.
• Single sign-on (Google, GitHub).
• Multi-factor authentication and passkeys.
• Remaining enterprise flows (device, SAML, LDAP).

Outcome

Full feature parity with today's login experience, rebuilt on the new stack and ready for rollout.