feat: ✨ read all users for a role

feat: ✨ better reapply database migration compatibility
refactor: ♻️ better naming for some functions

src/database/comment.rs

@@ -73,7 +73,7 @@ pub async fn delete(
     .await
 }
 
-pub async fn read_all(
+pub async fn read_all_for_post(
     post_creation_time: DateTime<Utc>,
     database_connection: &Pool<Postgres>,
 ) -> Result<Vec<Comment>, sqlx::Error> {
@@ -86,4 +86,4 @@ pub async fn read_all(
     )
     .fetch_all(database_connection)
     .await
-}
+}