- Introduced endpoints for WebAuthn-based authentication flow (`/auth/passkey/challenge` and `/auth/passkey/verify`).
- Added support for generating and verifying WebAuthn PublicKeyCredentialRequestOptions and challenge tokens.
- Extended routing logic to expose matched route templates for improved parameter handling.
- Updated OpenAPI specifications to document passkey challenge and verification workflows.
- Included unit tests for validating both existing and non-existing user scenarios during passkey challenges.