feat(inspur_legacy): new parser for pre-Kaytus Inspur onekeylog

Older AMI-BMC Inspur onekeylog archives (NF5466M5 / NF5280M5 generation)
opened to an empty result: they carry none of the files the inspur parser
keys on (no asset.json, devicefrusdr.log, selelist.csv or component.log).

New package internal/parser/vendors/inspur_legacy (vendor id inspur_legacy),
separate from inspur:
- binary IPMI FRU decode (FRU.bin) -> board identity
- Inspur_AssetInfoInventory.log -> CPU / memory / PCIe / PSU inventory
- events from Inspur_<model>_<serial>_IDL, sel.log, blackbox.log,
  MegaRAID raid0.log, and the flat AMI <severity>.log files
- no live sensors in this archive class -> recorded as a collection error
- BMC clock timestamps before 2010 dropped as un-set (1970 / ~2005 RTC)

Registry: add optional PrioritizedParser { DetectPriority() int } so a
confidence tie is broken by specificity. inspur_legacy returns 10 and also
declines (Detect 0) when modern Kaytus markers are present, so the two
Inspur parsers never fight over a newer dump.

Docs: ADL-065, 06-parsers.md, releases/v1.32.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017VL8wLGD6Lnp6hZCpqT6cZ

internal/parser/vendors/inspur_legacy/events.go

@@ -0,0 +1,54 @@
+package inspurlegacy
+
+import (
+	"sort"
+	"strings"
+	"time"
+
+	"git.mchus.pro/mchus/logpile/internal/models"
+)
+
+// bogusYear reports whether a timestamp comes from an AMI BMC clock that had
+// not yet been set: the 1970/1971 epoch, or the ~2005 firmware-default RTC seen
+// in alert.log. This hardware shipped no earlier than 2018, so any event before
+// 2010 has no trustworthy wall-clock time.
+func bogusYear(t time.Time) bool { return t.Year() < 2010 }
+
+// severityFromWord maps a free-text severity/class word to models.Severity.
+func severityFromWord(s string) models.Severity {
+	switch strings.ToLower(strings.TrimSpace(s)) {
+	case "critical", "error", "fatal", "serious", "nonrecoverable", "non-recoverable":
+		return models.SeverityCritical
+	case "warning", "warn", "predictive":
+		return models.SeverityWarning
+	default:
+		return models.SeverityInfo
+	}
+}
+
+// dedupeEvents removes exact duplicates (same timestamp, source, description)
+// in place, preserving order. The same fault is often reported by both the IDL
+// log and sel.log.
+func dedupeEvents(events []models.Event) []models.Event {
+	seen := make(map[string]struct{}, len(events))
+	out := events[:0]
+	for _, e := range events {
+		key := e.Timestamp.Format(time.RFC3339) + "|" + e.Source + "|" + e.SensorName + "|" + e.Description
+		if _, ok := seen[key]; ok {
+			continue
+		}
+		seen[key] = struct{}{}
+		out = append(out, e)
+	}
+	return out
+}
+
+// sortEvents orders events chronologically, then by source for stability.
+func sortEvents(events []models.Event) {
+	sort.SliceStable(events, func(i, j int) bool {
+		if !events[i].Timestamp.Equal(events[j].Timestamp) {
+			return events[i].Timestamp.Before(events[j].Timestamp)
+		}
+		return events[i].Source < events[j].Source
+	})
+}