fix: normalize MAC address format in get_mac_address_table()

Raw MAC addresses from the ArubaOS-Switch API use a non-standard
format; normalize via napalm.base.helpers.mac() for consistency.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

napalm_procurve/api_client.py

@@ -13,6 +13,7 @@ from typing import Any, Dict, Optional, Tuple
 import requests
 import urllib3
 
+from napalm.base import helpers as napalm_helpers
 from napalm.base.exceptions import ConnectionException, ConnectAuthError
 
 logger = logging.getLogger("napalm_procurve.api")
@@ -366,9 +367,14 @@ class ProcurveApiClient:
         mac_data = self.get("mac-table")
         table = []
         for entry in mac_data.get("mac_table_entry_element", []):
+            raw_mac = entry.get("mac_address", "")
+            try:
+                mac = napalm_helpers.mac(raw_mac)
+            except Exception:
+                mac = raw_mac
             table.append(
                 {
-                    "mac": entry.get("mac_address", ""),
+                    "mac": mac,
                     "interface": entry.get("port_id", ""),
                     "vlan": int(entry.get("vlan_id", 0)),
                     "static": entry.get("mac_addr_type", "").lower() == "static",