feat: rewrite scheduled_tasks in rust

lib/libpk/src/db/repository/stats.rs

@@ -3,6 +3,19 @@ pub async fn get_stats(pool: &sqlx::postgres::PgPool) -> anyhow::Result<Counts>
     Ok(counts)
 }
 
+pub async fn insert_stats(
+    pool: &sqlx::postgres::PgPool,
+    table: &str,
+    value: i64,
+) -> anyhow::Result<()> {
+    // danger sql injection
+    sqlx::query(format!("insert into {table} values (now(), $1)").as_str())
+        .bind(value)
+        .execute(pool)
+        .await?;
+    Ok(())
+}
+
 #[derive(serde::Serialize, sqlx::FromRow)]
 pub struct Counts {
     pub system_count: i64,