Add a bunch of logging to verification

So we have a better idea of what's going on

src/crypto/verification/Base.js

@@ -303,6 +303,10 @@ export class VerificationBase extends EventEmitter {
             throw new Error("No devices could be verified");
         }
 
+        logger.info("Verification completed! Marking devices verified: ", verifiedDevices);
+        // TODO: There should probably be a batch version of this, otherwise it's going
+        // to upload each signature in a separate API call which is silly because the
+        // API supports as many signatures as you like.
         for (const deviceId of verifiedDevices) {
             await this._baseApis.setDeviceVerified(userId, deviceId);
         }