fixed minor bugs, added import for From-Hell in Erfurt

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

de.srsoftware.cal.db/src/main/java/de/srsoftware/cal/db/MariaDB.java

@@ -286,14 +286,14 @@ public class MariaDB implements Database {
 		try {
 			extractCoords(results.getString(COORDS)).optional().ifPresent(appointment::coords);
 		} catch (SQLException e) {
-			LOG.log(WARNING, "Failed to read coordinates from database!");
+			LOG.log(TRACE, "Result set did not cointain coords!");
 		}
 
 		try {
 			var tags = nullIfEmpty(results.getString("tags"));
 			if (tags != null) appointment.tags(tags.split(","));
 		} catch (SQLException e) {
-			LOG.log(WARNING, "Failed to read tags from database!");
+			LOG.log(TRACE, "Result set did not cointain tags!");
 		}
 		return Payload.of(appointment);
 	}