fix(parser): support Inspur HGX dump_<serial>_<timestamp>/ onekeylog layout

Fixes #20. This onekeylog variant has no devicefrusdr.log at all: FRU/sensors
come from raw ipmitool text output, PCIe/GPU presence has a dedicated
structural snapshot, SEL lives at a different path, and BMC component
failures are logged separately from SEL/IDL.

- Fall back to component/fru.txt (same FRU block format as devicefrusdr.log)
  and component/sensor.txt / sdr.txt (ipmitool sensor list / sdr elist)
  when devicefrusdr.log is absent.
- Parse log/bmc/diagnose/OtrdDiagnoseComponent.json's PCIe Device Info array
  for GPU/PCIe presence and link state, independent of SEL/IDL alarm
  history; flag devices running below their negotiated max link
  speed/width as degraded with a Warning event.
- Fall back to log/sel.csv (same format as selelist.csv) when selelist.csv
  is absent.
- Parse log/bmc/commer-comp/{commerslot,commerhmc,commerswvr,commerswcpld}
  logs (including rotated *.tar.gz.N parts) into failure events, filtering
  known-noisy lines.
- Collapse SEL events duplicated across sources by
  (timestamp, event_type, description).
- Surface a CollectionError when FRU/sensors are still empty after all
  fallbacks, instead of silently returning an empty inventory.
- Fix ParseFRU: a later placeholder "Product Serial : 0" / "Product Part
  Number : NULL" line in the same FRU block (e.g. SCM_FRU) was overwriting
  an already-parsed real Board Serial/Part Number.

Verified against dump_23DB01633_20260727-1359.tar.gz (HGX B200, KR9288-X3):
fru 0→21, sensors 0→303, 8 GPUs present at Gen5 x16 in slots 100-107.

Deferred (not covered by this change): BIOS-change-settings context and
BIOS POST codes from the same layout — see bible-local/10-decisions.md
ADL-048.

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

internal/parser/vendors/inspur/sel.go

@@ -176,6 +176,32 @@ func determineSELSeverity(sensorStr, eventDesc, status string) models.Severity {
 	return models.SeverityInfo
 }
 
+// dedupSELEvents collapses events reported more than once with the same
+// (timestamp, event_type, description) triple. Unlike ParseIDLLog's
+// dedup (which must keep recurring alarms with distinct timestamps), this
+// only removes true duplicates: the same SEL entry surfacing through more
+// than one source file for the exact same moment.
+func dedupSELEvents(events []models.Event) []models.Event {
+	if len(events) == 0 {
+		return events
+	}
+	seen := make(map[string]struct{}, len(events))
+	out := make([]models.Event, 0, len(events))
+	for _, e := range events {
+		if e.Source != "SEL" {
+			out = append(out, e)
+			continue
+		}
+		key := e.Timestamp.String() + "|" + e.EventType + "|" + e.Description
+		if _, ok := seen[key]; ok {
+			continue
+		}
+		seen[key] = struct{}{}
+		out = append(out, e)
+	}
+	return out
+}
+
 // buildSELDescription builds human-readable description
 func buildSELDescription(eventDesc, status string) string {
 	if status == "Asserted" || status == "Deasserted" {