v0.34.4

• Add and enforce uniqueness requirement across email and unverified_email columns.
• Add periodic clean-up job for stale users missing email verification.
• Add missing username uniqueness requirement and fix session cleanup for experimental PG setup.
• Fix JSON schema construction for nullable ANY columns.
• A more consistent integration test setup across the 8 client environments.
• Update dependencies.

Full Changelog: v0.34.3...v0.34.4