Fix recurring task crash

It would fail when inserting a commit into the queue that was already in
the queue, instead of just skipping that commit.

src/server/recurring/queue.rs

@@ -19,7 +19,7 @@ pub async fn update(db: &SqlitePool) -> somehow::Result<()> {
     for row in new {
         let date = OffsetDateTime::now_utc();
         sqlx::query!(
-            "INSERT INTO queue (hash, date) VALUES (?, ?)",
+            "INSERT OR IGNORE INTO queue (hash, date) VALUES (?, ?)",
             row.hash,
             date,
         )