fix: replace last_added_location_id with last_added_location_timestamp

Stored location ID was not actually used
and locations_last_sent timestamp was updated
with the current time, possibly skipping
locations.

src/chat.rs

@@ -2926,10 +2926,9 @@ pub(crate) async fn create_send_msg_jobs(context: &Context, msg: &mut Message) -
 
     let now = time();
 
-    if rendered_msg.last_added_location_id.is_some()
-        && let Err(err) = location::set_kml_sent_timestamp(context, msg.chat_id, now).await
-    {
-        error!(context, "Failed to set kml sent_timestamp: {err:#}.");
+    if let Some(last_added_location_timestamp) = rendered_msg.last_added_location_timestamp {
+        location::set_kml_sent_timestamp(context, msg.chat_id, last_added_location_timestamp)
+            .await?;
     }
 
     if attach_selfavatar && let Err(err) = msg.chat_id.set_selfavatar_timestamp(context, now).await