fix add multi-transport information to Context.get_info (#7583)

This adds information of all used transports to `Context.get_info` in
the key `used_transport_settings`.

The format is the same as in `used_account_settings`. The new property
also contains the primary account, so we could remove
`used_account_settings` now, though there is also
`entered_account_settings` in which it stays in relation.

- there is an alternative pr at
https://github.com/chatmail/core/pull/7584, which gives each transport
it's own key, which improves readability.

closes #7581

src/context.rs

@@ -822,6 +822,16 @@ impl Context {
             |(_transport_id, param)| param.to_string(),
         );
         let secondary_addrs = self.get_secondary_self_addrs().await?.join(", ");
+        let all_transports: Vec<String> = ConfiguredLoginParam::load_all(self)
+            .await?
+            .into_iter()
+            .map(|(transport_id, param)| format!("{transport_id}: {param}"))
+            .collect();
+        let all_transports = if all_transports.is_empty() {
+            "Not configured".to_string()
+        } else {
+            all_transports.join(",")
+        };
         let chats = get_chat_cnt(self).await?;
         let unblocked_msgs = message::get_unblocked_msg_cnt(self).await;
         let request_msgs = message::get_request_msg_cnt(self).await;
@@ -902,6 +912,7 @@ impl Context {
         res.insert("proxy_enabled", proxy_enabled.to_string());
         res.insert("entered_account_settings", l.to_string());
         res.insert("used_account_settings", l2);
+        res.insert("used_transport_settings", all_transports);
 
         if let Some(server_id) = &*self.server_id.read().await {
             res.insert("imap_server_id", format!("{server_id:?}"));