Sanitize Redfish string fields to strip non-ASCII/non-printable characters

IOM1's HostName field contains binary artifacts that decode to garbage
unicode characters (e.g. 𳇀 prefixing a UUID). Strip any character
outside printable ASCII (0x20–0x7F) from all string fields returned by
_parse_network_data.

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

modules/workflow_check.py

@@ -27,6 +27,12 @@ from ui import (
 
 # ── Shared helpers ─────────────────────────────────────────────────────────────
 
+def _sanitize(value: str) -> str:
+    """Strip non-printable and non-ASCII characters from a string field.
+    IOM Redfish responses occasionally contain binary artifacts in text fields."""
+    return "".join(c for c in value if 32 <= ord(c) < 128)
+
+
 def _parse_network_data(data: dict) -> tuple:
     """
     Extract network details from a Redfish EthernetInterfaces/1 response dict.
@@ -41,15 +47,15 @@ def _parse_network_data(data: dict) -> tuple:
     addrs = data.get("IPv4StaticAddresses") or data.get("IPv4Addresses", [])
     if addrs:
         addr    = addrs[0]
-        ip      = addr.get("Address",    "--")
-        gateway = addr.get("Gateway",    "--")
-        netmask = addr.get("SubnetMask", "--")
+        ip      = _sanitize(addr.get("Address",    "--"))
+        gateway = _sanitize(addr.get("Gateway",    "--"))
+        netmask = _sanitize(addr.get("SubnetMask", "--"))
     else:
         ip = gateway = netmask = "--"
 
-    mac         = data.get("MACAddress",  "--")
-    hostname    = data.get("HostName",    "--")
-    link_status = data.get("LinkStatus",  "--")
+    mac         = _sanitize(data.get("MACAddress",  "--"))
+    hostname    = _sanitize(data.get("HostName",    "--"))
+    link_status = _sanitize(data.get("LinkStatus",  "--"))
 
     return dhcp_enabled, ip, gateway, netmask, mac, hostname, link_status