Add report + moderation messaging (#567)

* Add report + moderation messaging

* Add system messages

* address review comments

* Remove ds store

* Update messaging

* run prep

---------

Co-authored-by: Geometrically <geometrically@Jais-MacBook-Pro.local>

src/database/models/user_item.rs

@@ -451,6 +451,28 @@ impl User {
         .execute(&mut *transaction)
         .await?;
 
+        sqlx::query!(
+            r#"
+            UPDATE threads_messages
+            SET body = '{"type": "deleted"}', author_id = $2
+            WHERE author_id = $1
+            "#,
+            id as UserId,
+            deleted_user as UserId,
+        )
+        .execute(&mut *transaction)
+        .await?;
+
+        sqlx::query!(
+            "
+            DELETE FROM threads_members
+            WHERE user_id = $1
+            ",
+            id as UserId,
+        )
+        .execute(&mut *transaction)
+        .await?;
+
         sqlx::query!(
             "
             DELETE FROM users