Add channel id to call events

Co-Authored-By: Max Brunsfeld <maxbrunsfeld@gmail.com>

crates/client/src/telemetry.rs

@@ -74,6 +74,7 @@ pub enum ClickhouseEvent {
     Call {
         operation: &'static str,
         room_id: u64,
+        channel_id: Option<u64>,
     },
 }