extend recording_playback with an open_id

As noted in schema.sql, this can be used for disambiguation. It also may be
useful in diagnosing data integrity problems.

Also, sneak in a couple minor improvements: better diagnostics in a couple
places, fix to 1->2 upgrade procedure.

src/main.rs

@@ -136,7 +136,7 @@ fn main() {
     h.clone().install().unwrap();
 
     if let Err(e) = { let _a = h.async(); args.arg_command.unwrap().run() } {
-        error!("{}", e);
+        error!("{:?}", e);
         ::std::process::exit(1);
     }
     info!("Success.");