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/commercomp_test.go

@@ -0,0 +1,36 @@
+package inspur
+
+import (
+	"testing"
+	"time"
+
+	"git.mchus.pro/mchus/logpile/internal/parser"
+)
+
+func TestParseCommerCompEvents(t *testing.T) {
+	content := []byte(`[2026-07-08 16:46:19][commer_comp_anal.c, 635][Critial] [COMP]Invalid Comp Data, Continue... ParamList: Index-3, Valid-0x1, MediaType-0(1-PCIE,2-I2C)
+[2026-07-27 04:52:55][commer_comp_slot.c, 319][Critial] Data Update fail for dev serial-6!
+[2026-07-27 04:52:55][commer_comp_slot.c, 319][Critial] Data Update fail for dev serial-7!
+[2026-07-27 05:00:00][commer_comp_slot.c, 100][Info] Error in update redis, retry
+`)
+
+	files := []parser.ExtractedFile{
+		{Path: "log/bmc/commer-comp/commerslot/commerslot.log", Content: content},
+	}
+
+	events := ParseCommerCompEvents(files, time.UTC)
+	if len(events) != 2 {
+		t.Fatalf("expected 2 events (noise filtered), got %d: %+v", len(events), events)
+	}
+	for _, e := range events {
+		if e.Source != "BMC/commerslot" {
+			t.Fatalf("unexpected source %q", e.Source)
+		}
+	}
+	if events[0].Timestamp.Format("2006-01-02 15:04:05") != "2026-07-27 04:52:55" {
+		t.Fatalf("unexpected timestamp: %v", events[0].Timestamp)
+	}
+	if events[0].ID == events[1].ID {
+		t.Fatalf("expected distinct event IDs for serial-6/serial-7, got same: %q", events[0].ID)
+	}
+}