fix: dedup GPUs across multiple chassis PCIeDevice trees in Redfish collector

Supermicro HGX exposes each GPU under both Chassis/1/PCIeDevices and a
dedicated Chassis/HGX_GPU_SXM_N/PCIeDevices. gpuDocDedupKey was keying
by @odata.id path, so identical GPUs with the same serial were not
deduplicated across sources. Now stable identifiers (serial → BDF →
slot+model) take priority over path.

Also includes Inspur parser improvements: NVMe model/serial enrichment
from devicefrusdr.log and audit.log, RAID drive slot normalization to
BP notation, PSU slot normalization, BMC/CPLD/VR firmware from RESTful
version info section, and parser version bump to 1.8.

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

internal/parser/vendors/inspur/audit.go

@@ -0,0 +1,94 @@
+package inspur
+
+import (
+	"fmt"
+	"regexp"
+	"strconv"
+	"strings"
+)
+
+// auditSNChangedNVMeRegex matches:
+// "Front Back Plane N NVMe DiskM  SN changed from X   to Y"
+// Captures: disk_num, new_serial
+var auditSNChangedNVMeRegex = regexp.MustCompile(`NVMe Disk(\d+)\s+SN changed from \S+\s+to\s+(\S+)`)
+
+// auditSNChangedRAIDRegex matches:
+// "Raid(Pcie Slot:N) HDD(enclosure id:E slot:S)  SN changed from X   to Y"
+// Captures: pcie_slot, enclosure_id, slot_num, new_serial
+var auditSNChangedRAIDRegex = regexp.MustCompile(`Raid\(Pcie Slot:(\d+)\) HDD\(enclosure id:(\d+) slot:(\d+)\)\s+SN changed from \S+\s+to\s+(\S+)`)
+
+// ParseAuditLogNVMeSerials parses audit.log and returns the final (latest) serial number
+// per NVMe disk number. The disk number matches the numeric suffix in PCIe location
+// strings like "#NVME0", "#NVME2", etc. from devicefrusdr.log.
+// Entries where the serial changed to "NULL" are excluded.
+func ParseAuditLogNVMeSerials(content []byte) map[int]string {
+	serials := make(map[int]string)
+
+	for _, line := range strings.Split(string(content), "\n") {
+		m := auditSNChangedNVMeRegex.FindStringSubmatch(line)
+		if m == nil {
+			continue
+		}
+		diskNum, err := strconv.Atoi(m[1])
+		if err != nil {
+			continue
+		}
+		serial := strings.TrimSpace(m[2])
+		if strings.EqualFold(serial, "NULL") || serial == "" {
+			delete(serials, diskNum)
+		} else {
+			serials[diskNum] = serial
+		}
+	}
+	if len(serials) == 0 {
+		return nil
+	}
+	return serials
+}
+
+// ParseAuditLogRAIDSerials parses audit.log and returns the final (latest) serial number
+// per RAID backplane disk. Key format is "BP{enclosure_id-1}:{slot_num}" (e.g. "BP0:0").
+//
+// Each disk slot is claimed by a specific RAID controller (Pcie Slot:N). NULL events from
+// an old controller do not clear serials assigned by a newer controller, preventing stale
+// deletions when disks are migrated between RAID arrays.
+func ParseAuditLogRAIDSerials(content []byte) map[string]string {
+	// owner tracks which PCIe RAID controller slot last assigned a serial to a disk key.
+	serials := make(map[string]string)
+	owner := make(map[string]int)
+
+	for _, line := range strings.Split(string(content), "\n") {
+		m := auditSNChangedRAIDRegex.FindStringSubmatch(line)
+		if m == nil {
+			continue
+		}
+		pcieSlot, err := strconv.Atoi(m[1])
+		if err != nil {
+			continue
+		}
+		enclosureID, err := strconv.Atoi(m[2])
+		if err != nil {
+			continue
+		}
+		slotNum, err := strconv.Atoi(m[3])
+		if err != nil {
+			continue
+		}
+		serial := strings.TrimSpace(m[4])
+		key := fmt.Sprintf("BP%d:%d", enclosureID-1, slotNum)
+		if strings.EqualFold(serial, "NULL") || serial == "" {
+			// Only clear if this controller was the last to set the serial.
+			if owner[key] == pcieSlot {
+				delete(serials, key)
+				delete(owner, key)
+			}
+		} else {
+			serials[key] = serial
+			owner[key] = pcieSlot
+		}
+	}
+	if len(serials) == 0 {
+		return nil
+	}
+	return serials
+}