updated the phone regex to enforce strictness

phone/phone.go

@@ -9,7 +9,9 @@ import (
 // Define the regex patterns as constants
 const (
 	// TODO: This should rather use a phone package to determine whether valid phone number for any region.
-	phoneRegex = `^(?:\+254|254|0)?((?:7[0-9]{8})|(?:1[01][0-9]{7}))$`
+	// Kenyan phone numbers: must be exactly 10 digits (07XXXXXXXX or 01XXXXXXXX) when starting with 0
+	// Or start with 254 / +254 and still follow the same pattern
+	phoneRegex = `^(?:\+254|254|0)(7\d{8}|1[01]\d{7})$`
 )
 
 // IsValidPhoneNumber checks if the given number is a valid phone number