Refactor string representation methods for 'Priority'

The 'FacilityStringFromPrio' and 'SeverityStringFromPrio' methods are refactored to match the 'fmt.Stringer' interface. This makes the code more idiomatic and reduces the need for specific switch cases to handle different scenarios, thus paving the way for improved code maintainability.

priority.go

@@ -68,7 +68,17 @@ func SeverityFromPrio(p Priority) Severity {
 
 // FacilityStringFromPrio returns a string representation of the Facility of a given Priority
 func FacilityStringFromPrio(p Priority) string {
-	switch FacilityFromPrio(p) {
+	return FacilityFromPrio(p).String()
+}
+
+// SeverityStringFromPrio returns a string representation of the Severity of a given Priority
+func SeverityStringFromPrio(p Priority) string {
+	return SeverityFromPrio(p).String()
+}
+
+// String satisfies the fmt.Stringer interface for the Facility type
+func (f Facility) String() string {
+	switch f {
 	case 0:
 		return "KERN"
 	case 1:
@@ -122,9 +132,9 @@ func FacilityStringFromPrio(p Priority) string {
 	}
 }
 
-// SeverityStringFromPrio returns a string representation of the Severity of a given Priority
-func SeverityStringFromPrio(p Priority) string {
-	switch SeverityFromPrio(p) {
+// String satisfies the fmt.Stringer interface for the Severity type
+func (s Severity) String() string {
+	switch s {
 	case 0:
 		return "EMERGENCY"
 	case 1: