[server] bump log level from debug to error for generic exceptions

Author: Cyril de Catheu

thirdeye-server/src/main/java/ai/startree/thirdeye/exception/GenericExceptionMapper.java

@@ -44,7 +44,7 @@ public GenericExceptionMapper() {
   @Override
   public Response toResponse(final Throwable exception) {
     final ThirdEyeStatus status = statusFor(exception);
-    LOG.debug(
+    LOG.error(
         "Request failed because of a {}. Returning error code {}",
         exception.getClass().getSimpleName(),
         status.getRecommendedStatusCode(), exception);