remove getAllUpdates() and add a typical replicatio API for the update call (#3081)

* (r10s, adb, hpk) remove getAllUpdates() and add a typical replica-API that works with increasing serials.  Streamline docs a bit.

* adapt ffi to new api

* documentation: updates serials may have gaps

* get_webxdc_status_updates() return updates larger than a given serial

* remove status_update_id from status-update-event; it is not needed (ui should update from the last known serial) and easily gets confused with last_serial

* unify wording to 'StatusUpdateSerial'

* remove legacy payload format, all known webxdc should be adapted

* add serial and max_serial to status updates

* avoid races when getting max_serial by avoiding two SQL calls

* update changelog

Co-authored-by: B. Petersen <r10s@b44t.com>

src/events.rs

@@ -9,7 +9,6 @@ use strum::EnumProperty;
 use crate::chat::ChatId;
 use crate::ephemeral::Timer as EphemeralTimer;
 use crate::message::MsgId;
-use crate::webxdc::StatusUpdateId;
 
 #[derive(Debug)]
 pub struct Events {
@@ -329,8 +328,5 @@ pub enum EventType {
     SelfavatarChanged,
 
     #[strum(props(id = "2120"))]
-    WebxdcStatusUpdate {
-        msg_id: MsgId,
-        status_update_id: StatusUpdateId,
-    },
+    WebxdcStatusUpdate(MsgId),
 }