feat: Expose InvocationID to plugin

plugin/v3/plugin.proto

@@ -58,6 +58,7 @@ message Init {
  message Request {
  bytes spec = 1; // Internal plugin-specific spec
  bool no_connection = 2; // A flag to indicate plugins should skip establishing a connection
+ string invocation_id = 3; // unique execution_id that will identify the invocation (sync, migrate etc)
  }
  message Response {}
 }