Add debug logging when reading log-level from TOML file

Co-authored-by: George L. Yermulnik <yz@yz.kiev.ua>

lib/param_parsing/toml.go

@@ -32,6 +32,7 @@ func getParamsTOML(params Params) (Params, error) {
 		}
 		if viperParser.Get("log-level") != nil {
 			params.LogLevel = viperParser.GetString("log-level")
+			logger.Debugf("Using \"log-level\" from %q: %q", tomlPath, params.LogLevel)
 		}
 		if viperParser.Get("version") != nil {
 			params.Version = viperParser.GetString("version")