feat: add smart_serial() function to extract manufacturer serial numbers from SMART data with fallback chain and parallel execution

Add smart_serial() function with smartctl -i command execution, fallback to -d sat mode, and Serial Number: field regex extraction with WWN/0x prefix filtering to prefer physical serial over logical identifiers. Add serial_futures dict with service_check_executor.submit() calls for parallel serial reads alongside smart_futures/temperature_futures. Update raid_status() disk

app.py

@@ -365,6 +365,18 @@ def smart_status(device):
     health = re.search(r"(?:SMART overall-health self-assessment test result|SMART Health Status):\s*(.+)", smart_output, re.IGNORECASE)
     return health.group(1).strip() if health else ("Fehler: " + smart_error.strip()[:80] if smart_error.strip() else "Nicht unterstützt")
 
+def smart_serial(device):
+    """Read the manufacturer serial, not a WWN or SCSI by-id alias."""
+    if not shutil.which("smartctl"):
+        return ""
+    smart_device = device.replace("/dev/", f"{HOST_DEVICE_PATH.rstrip('/')}/", 1)
+    for command in (["smartctl", "-i", "-d", "sat", smart_device], ["smartctl", "-i", smart_device]):
+        output, _ = _read_command(command, timeout=6, warn_on_nonzero=False)
+        match = re.search(r"^\s*Serial Number:\s*(\S+)\s*$", output, re.IGNORECASE | re.MULTILINE)
+        if match and not match.group(1).lower().startswith(("wwn-", "0x")):
+            return match.group(1).strip()
+    return ""
+
 def smart_temperature(device):
     """Read the drive temperature in a controller-friendly way."""
     if not SMART_ENABLED or not shutil.which("smartctl"):
@@ -457,9 +469,11 @@ def raid_status():
     except (ValueError, AttributeError):
         block_devices = {}
     smart_futures = {}
+    serial_futures = {}
     temperature_futures = {}
     if shutil.which("smartctl"):
         smart_futures = {disk["device"]: service_check_executor.submit(smart_status, disk["device"]) for disk in devices}
+        serial_futures = {disk["device"]: service_check_executor.submit(smart_serial, disk["device"]) for disk in devices}
         temperature_futures = {disk["device"]: service_check_executor.submit(smart_temperature, disk["device"]) for disk in devices}
     for disk in devices:
         info = block_devices.get(disk["device"], {})
@@ -473,7 +487,7 @@ def raid_status():
                 info = host_items[0] if host_items else {}
             except (ValueError, AttributeError):
                 info = {}
-        serial = info.get("serial") or _device_serial(disk["device"])
+        serial = (serial_futures[disk["device"]].result() if disk["device"] in serial_futures else "") or info.get("serial") or _device_serial(disk["device"])
         disk.update({"size": format_bytes(info.get("size") or 0) if info.get("size") else "—", "model": info.get("model") or "—", "serial": serial or "—"})
         serial_log_key = "serial:" + disk["device"]
         if not serial and serial_log_key not in hardware_log_once: