Add back bridge_commands_support via backend.proto

rslib/backend.proto

@@ -1092,6 +1092,7 @@ message GraphsOut {
   uint32 scheduler_version = 5;
   /// Seconds to add to UTC timestamps to get local time.
   int32 local_offset_secs = 7;
+  bool bridge_commands_supported = 8;
 }
 
 message GraphPreferences {

rslib/src/stats/graphs.rs

@@ -44,6 +44,7 @@ impl Collection {
             next_day_at_secs: timing.next_day_at as u32,
             scheduler_version: self.sched_ver() as u32,
             local_offset_secs: local_offset_secs as i32,
+            bridge_commands_supported: true,
         })
     }