The full nova-idp-auth Lambda handler is included in this commit (sign_up,
sign_in, create_session, request_password_reset, reset_password) since the
hashing module and handler share one file. The Argon2id hashing + fail-closed
logic is the security-engineer territory; the Lambda plumbing is backend-engineer.
---ci---
project: acdl
phase: 3
milestone: v1.28
status: execute
persona: security-engineer
---
Jon Chery