fix: ensure limit is always at least 1 when sent to database

crates/core/database/src/models/messages/ops/mongodb.rs

@@ -95,7 +95,7 @@ impl AbstractMessages for MongoDb {
                         COL,
                         older_message_filter,
                         FindOptions::builder()
-                            .limit(limit / 2)
+                            .limit(limit / 2 + 1)
                             .sort(doc! {
                                 "_id": -1_i32
                             })