Finish routing eventualities

Also corrects some misc TODOs and tidies up some log statements.

processor/src/tests/wallet.rs

@@ -39,6 +39,9 @@ pub async fn test_wallet<C: Coin>(coin: C) {
         assert_eq!(outputs.len(), 1);
         (block_id, outputs)
       }
+      ScannerEvent::Completed(_, _) => {
+        panic!("unexpectedly got eventuality completion");
+      }
     }
   };
 
@@ -105,6 +108,9 @@ pub async fn test_wallet<C: Coin>(coin: C) {
       assert_eq!(time, block.time());
       assert_eq!(these_outputs, outputs);
     }
+    ScannerEvent::Completed(_, _) => {
+      panic!("unexpectedly got eventuality completion");
+    }
   }
 
   // Check the Scanner DB can reload the outputs