redfish: MSI support, fix zero dates, BMC MAC, Assembly FRU, crawler cleanup

- Add MSI CG480-S5063 (H100 SXM5) support:
  - collectGPUsFromProcessors: find GPUs via Processors/ProcessorType=GPU,
    resolve serials from Chassis/<GpuId>
  - looksLikeGPU: skip Description="Display Device" PCIe sidecars
  - isVirtualStorageDrive: filter AMI virtual USB drives (0-byte)
  - enrichNICMACsFromNetworkDeviceFunctions: pull MACs for MSI NICs
  - parseCPUs: filter by ProcessorType, parse Socket, L1/L2/L3 from ProcessorMemory
  - parseMemory: Location.PartLocation.ServiceLabel slot fallback
  - shouldCrawlPath: block /SubProcessors subtrees
- Fix status_checked_at/status_changed_at serializing as 0001-01-01:
  change all StatusCheckedAt/StatusChangedAt fields to *time.Time
- Redfish crawler cleanup:
  - Block non-inventory branches: AccountService, CertificateService,
    EventService, Registries, SessionService, TaskService, manager config paths,
    OperatingConfigs, BootOptions, HostPostCode, Bios/Settings, OEM KVM paths
  - Add Assembly to critical endpoints (FRU data)
  - Remove BootOptions from priority seeds
- collectBMCMAC: read BMC MAC from Managers/*/EthernetInterfaces
- collectAssemblyFRU: extract FRU serial/part from Chassis/*/Assembly
- Firmware: remove NetworkProtocol noise, fix SecureBoot field,
  filter BMCImageN redundant backup slots

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

internal/parser/vendors/inspur/gpu_status.go

@@ -70,11 +70,13 @@ func applyGPUStatusFromEvents(hw *models.HardwareConfig, events []models.Event)
 					ChangedAt: e.Timestamp,
 					Details:   strings.TrimSpace(e.Description),
 				})
-				gpu.StatusChangedAt = e.Timestamp
+				ts := e.Timestamp
+				gpu.StatusChangedAt = &ts
 				currentStatus[idx] = newStatus
 			}
 
-			gpu.StatusCheckedAt = e.Timestamp
+			ts := e.Timestamp
+			gpu.StatusCheckedAt = &ts
 		}
 	}
 
@@ -85,7 +87,7 @@ func applyGPUStatusFromEvents(hw *models.HardwareConfig, events []models.Event)
 		} else {
 			gpu.ErrorDescription = ""
 		}
-		if gpu.StatusCheckedAt.IsZero() && strings.TrimSpace(gpu.Status) == "" {
+		if gpu.StatusCheckedAt == nil && strings.TrimSpace(gpu.Status) == "" {
 			gpu.Status = "OK"
 		}
 	}

internal/parser/vendors/nvidia/component_status_time.go

@@ -230,7 +230,7 @@ func ApplyGPUAndNVSwitchCheckTimes(result *models.AnalysisResult, times componen
 		if ts.IsZero() {
 			continue
 		}
-		gpu.StatusCheckedAt = ts
+		gpu.StatusCheckedAt = &ts
 		status := strings.TrimSpace(gpu.Status)
 		if status == "" {
 			status = "Unknown"
@@ -261,7 +261,7 @@ func ApplyGPUAndNVSwitchCheckTimes(result *models.AnalysisResult, times componen
 			continue
 		}
 
-		dev.StatusCheckedAt = ts
+		dev.StatusCheckedAt = &ts
 		status := strings.TrimSpace(dev.Status)
 		if status == "" {
 			status = "Unknown"

internal/parser/vendors/nvidia/component_status_time_test.go

@@ -72,20 +72,20 @@ func TestApplyGPUAndNVSwitchCheckTimes(t *testing.T) {
 		NVSwitchBySlot: map[string]time.Time{"NVSWITCH0": nvsTs},
 	})
 
-	if got := result.Hardware.GPUs[0].StatusCheckedAt; !got.Equal(gpuTs) {
-		t.Fatalf("expected gpu status_checked_at %s, got %s", gpuTs.Format(time.RFC3339), got.Format(time.RFC3339))
+	if got := result.Hardware.GPUs[0].StatusCheckedAt; got == nil || !got.Equal(gpuTs) {
+		t.Fatalf("expected gpu status_checked_at %s, got %v", gpuTs.Format(time.RFC3339), got)
 	}
 	if result.Hardware.GPUs[0].StatusAtCollect == nil || !result.Hardware.GPUs[0].StatusAtCollect.At.Equal(gpuTs) {
 		t.Fatalf("expected gpu status_at_collection.at %s", gpuTs.Format(time.RFC3339))
 	}
-	if got := result.Hardware.PCIeDevices[0].StatusCheckedAt; !got.Equal(nvsTs) {
-		t.Fatalf("expected nvswitch status_checked_at %s, got %s", nvsTs.Format(time.RFC3339), got.Format(time.RFC3339))
+	if got := result.Hardware.PCIeDevices[0].StatusCheckedAt; got == nil || !got.Equal(nvsTs) {
+		t.Fatalf("expected nvswitch status_checked_at %s, got %v", nvsTs.Format(time.RFC3339), got)
 	}
 	if result.Hardware.PCIeDevices[0].StatusAtCollect == nil || !result.Hardware.PCIeDevices[0].StatusAtCollect.At.Equal(nvsTs) {
 		t.Fatalf("expected nvswitch status_at_collection.at %s", nvsTs.Format(time.RFC3339))
 	}
-	if !result.Hardware.PCIeDevices[1].StatusCheckedAt.IsZero() {
-		t.Fatalf("expected non-nvswitch device status_checked_at to stay zero")
+	if result.Hardware.PCIeDevices[1].StatusCheckedAt != nil {
+		t.Fatalf("expected non-nvswitch device status_checked_at to stay nil")
 	}
 }