feat(audit): capture IPMI FRU/Elabel, mc info and LAN on every audit

The techdump — the only place the IPMI FRU / Elabel identity (Product Name
= server model, serials, part numbers) is recorded — only ran under LiveCD.
Run it on every audit so `bee audit` on an installed host captures it too.

Also add `ipmitool mc info` and `ipmitool lan print` to the techdump, and
pin `ipmitool fru print 0` to FRU device 0 to match the Export Tools
"FRU / Elabel" editor exactly.

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

audit/internal/platform/techdump_test.go

@@ -7,6 +7,27 @@ import (
 	"testing"
 )
 
+func TestTechDumpCapturesIPMIIdentity(t *testing.T) {
+	t.Parallel()
+
+	want := map[string][]string{
+		"ipmitool-fru.txt":       {"fru", "print", "0"},
+		"ipmitool-mc-info.txt":   {"mc", "info"},
+		"ipmitool-lan-print.txt": {"lan", "print"},
+	}
+	for _, cmd := range techDumpFixedCommands {
+		if args, ok := want[cmd.File]; ok {
+			if cmd.Name != "ipmitool" || !reflect.DeepEqual(cmd.Args, args) {
+				t.Fatalf("%s: got %s %v, want ipmitool %v", cmd.File, cmd.Name, cmd.Args, args)
+			}
+			delete(want, cmd.File)
+		}
+	}
+	if len(want) != 0 {
+		t.Fatalf("techdump missing IPMI identity captures: %v", want)
+	}
+}
+
 func TestLSBLKDumpDevices(t *testing.T) {
 	t.Parallel()