JP fix(email): accept IPv6 prefix in address literals

HU-02: Strip the IPv6: prefix from bracketed email domain literals before IP validation. Addresses the existing test_email_accepts_ipv6_literal_with_prefix test.

Author: jibarra-cenfo

src/validators/email.py

@@ -68,6 +68,8 @@ def email(
         if domain_part.startswith("[") and domain_part.endswith("]"):
             # ref: RFC 5321
             domain_part = domain_part.lstrip("[").rstrip("]")
+            if ipv6_address and domain_part.startswith("IPv6:"):
+                domain_part = domain_part[5:]
         else:
             return False