avoid extraneous error logging on card enumeration

src/main/java/com/sparrowwallet/sparrow/io/Hwi.java

@@ -93,7 +93,7 @@ public class Hwi {
             } catch(CardNotPresentException e) {
                 //ignore
             } catch(CardException e) {
-                log.error("Error reading card", e);
+                log.info("Error reading card", e);
             }
         }
 

src/main/java/com/sparrowwallet/sparrow/io/ckcard/CardTransport.java

@@ -140,7 +140,7 @@ public class CardTransport {
                 }
             }
         } catch(CborException e) {
-            log.error("CBOR encoding error", e);
+            throw new CardException("CBOR encoding error", e);
         }
 
         return new JsonObject();