fix(lifecycle): cleanup lifecycle

- removes unwieldy SkipUpdate return value in favor of errors.Is
- generalizes the code for all four phases
- allows timeout to be defined for all phases
- enables explicit unit in timeout label values (in addition to implicit minutes)

internal/util/time.go

@@ -0,0 +1,15 @@
+package util
+
+import (
+	"strconv"
+	"time"
+)
+
+// ParseDuration parses the input string as a duration, treating a plain number as implicitly using the specified unit
+func ParseDuration(input string, unitlessUnit time.Duration) (time.Duration, error) {
+	if unitless, err := strconv.Atoi(input); err == nil {
+		return unitlessUnit * time.Duration(unitless), nil
+	}
+
+	return time.ParseDuration(input)
+}