Ignore upstream deprecation warnings

Author: GrantGryczan

backend/db.rs

@@ -53,11 +53,13 @@ async fn sync_terms_version_to_db() -> sqlx::Result<()> {
     let mut hasher = Sha256::new();
     hasher.update(include_bytes!("../frontend/components/TermsOfService.md"));
     let terms_hash = hasher.finalize();
+    #[expect(deprecated, reason = "Caused by upstream")]
     let terms_hash = terms_hash.as_slice();
 
     let mut hasher = Sha256::new();
     hasher.update(include_bytes!("../frontend/components/PrivacyNotice.md"));
     let privacy_hash = hasher.finalize();
+    #[expect(deprecated, reason = "Caused by upstream")]
     let privacy_hash = privacy_hash.as_slice();
 
     transaction!(async |tx| -> TxResult<_> {