fix(collector): surface RAID/HBA controller cards from Storage.StorageControllers[]

The RAID controller (XFusion XC170-M-8i / Broadcom SAS3808) never appeared
in inventory at all: it isn't listed in any Chassis/Systems PCIeDevices
collection on this BMC, and its dedicated Board resource link 404s (id
contains parentheses, same class of bug as the OCP NIC fixed earlier). Its
full identity -- model, firmware, BDF, vendor/device IDs -- was sitting
unread in the Storage resource's embedded StorageControllers[] array the
whole time.

Added parseStorageControllerPCIeDevice + collectStorageControllers to read
that array and surface the controller as a PCIeDevice entry, merged into
the existing pcie_devices list.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

internal/collector/redfish.go

@@ -4552,6 +4552,52 @@ func parsePCIeFunctionWithSupplementalDocs(doc map[string]interface{}, supplemen
 	return dev
 }
 
+// parseStorageControllerPCIeDevice builds a PCIeDevice entry from a
+// Storage.StorageControllers[] array member (Redfish's dedicated RAID/HBA
+// controller resource). Some BMCs (e.g. xFusion) never expose this
+// controller as a standalone PCIeDevice/Board resource — its Board link can
+// even 404 (id containing parentheses) — so without reading this embedded
+// array the RAID controller card never appears in inventory at all, even
+// though its identity (model, firmware, BDF, vendor/device IDs) is fully
+// present right here.
+func parseStorageControllerPCIeDevice(ctrl map[string]interface{}) models.PCIeDevice {
+	oem := redfishOEMxFusionSection(ctrl)
+
+	dev := models.PCIeDevice{
+		Slot: firstNonEmpty(
+			asString(ctrl["CardModel"]),
+			asString(ctrl["Name"]),
+			asString(ctrl["MemberId"]),
+		),
+		BDF:          sanitizeRedfishBDF(asString(oem["BDF"])),
+		DeviceClass:  "RAIDController",
+		Manufacturer: firstNonEmpty(asString(ctrl["Manufacturer"]), asString(ctrl["CardManufacturer"])),
+		Model:        firstNonEmpty(asString(ctrl["CardModel"]), asString(oem["Type"])),
+		Firmware:     asString(ctrl["FirmwareVersion"]),
+		PartNumber:   normalizeRedfishIdentityField(asString(ctrl["PartNumber"])),
+		SerialNumber: findFirstNormalizedStringByKeys(ctrl, "SerialNumber"),
+		VendorID:     asHexOrInt(oem["VenderID"]),
+		DeviceID:     asHexOrInt(oem["DeviceID"]),
+		Status:       mapStatus(ctrl["Status"]),
+	}
+	if dev.Slot == "" {
+		dev.Slot = "RAIDController"
+	}
+	return dev
+}
+
+func redfishOEMxFusionSection(doc map[string]interface{}) map[string]interface{} {
+	oem, ok := doc["Oem"].(map[string]interface{})
+	if !ok {
+		return nil
+	}
+	xfusion, ok := oem["xFusion"].(map[string]interface{})
+	if !ok {
+		return nil
+	}
+	return xfusion
+}
+
 func isMissingOrRawPCIModel(model string) bool {
 	model = strings.TrimSpace(model)
 	if model == "" {