chore: update dependencies

[dobby-coder]

Security advisory (cargo audit)

Crate	Advisory	Notes
lettre	RUSTSEC-2026-0141	vulnerability (current 0.11.19)
rustls-pemfile	RUSTSEC-2025-0134	(warning)

What to do

1. Bump lettre to a non-vulnerable version (cargo update -p lettre, or update the Cargo.toml constraint if needed).
2. Address the rustls-pemfile advisory (bump or allowlist).
3. Run cargo audit to confirm clean.
4. Run cargo build --release && cargo test.
5. Run cargo fmt before pushing.
6. Open a DRAFT PR titled chore: address cargo audit advisories. Assign @rubenhensen. Mark ready after CI passes.

[dobby-coder]

/dobby

[dobby-coder]

Dobby is on it! Dobby will check the lockfile, bump lettre, run cargo audit, then run the tests. Dobby promises to be careful with the rustls-pemfile transitive — it lives down in irma → pg-core and may not be fixable from this repo.