Improve Redfish recovery flow and raw export timing diagnostics

internal/server/raw_export.go

@@ -197,6 +197,11 @@ func buildHumanReadableCollectionLog(pkg *RawExportPackage, result *models.Analy
 		if pkg.Source.Filename != "" {
 			fmt.Fprintf(&b, "Source Filename: %s\n", pkg.Source.Filename)
 		}
+		if startedAt, finishedAt, ok := collectLogTimeBounds(pkg.Source.CollectLogs); ok {
+			fmt.Fprintf(&b, "Collection Started: %s\n", startedAt.Format(time.RFC3339Nano))
+			fmt.Fprintf(&b, "Collection Finished: %s\n", finishedAt.Format(time.RFC3339Nano))
+			fmt.Fprintf(&b, "Collection Duration: %s\n", formatRawExportDuration(finishedAt.Sub(startedAt)))
+		}
 	}
 
 	if pkg != nil && len(pkg.Source.CollectLogs) > 0 {
@@ -279,6 +284,42 @@ func buildHumanReadableCollectionLog(pkg *RawExportPackage, result *models.Analy
 	return b.String()
 }
 
+func collectLogTimeBounds(lines []string) (time.Time, time.Time, bool) {
+	var first time.Time
+	var last time.Time
+	for _, line := range lines {
+		line = strings.TrimSpace(line)
+		if line == "" {
+			continue
+		}
+		tsToken := line
+		if idx := strings.IndexByte(line, ' '); idx > 0 {
+			tsToken = line[:idx]
+		}
+		ts, err := time.Parse(time.RFC3339Nano, tsToken)
+		if err != nil {
+			continue
+		}
+		if first.IsZero() || ts.Before(first) {
+			first = ts
+		}
+		if last.IsZero() || ts.After(last) {
+			last = ts
+		}
+	}
+	if first.IsZero() || last.IsZero() || last.Before(first) {
+		return time.Time{}, time.Time{}, false
+	}
+	return first, last, true
+}
+
+func formatRawExportDuration(d time.Duration) string {
+	if d < 0 {
+		d = 0
+	}
+	return d.Round(time.Second).String()
+}
+
 func buildParserFieldSummary(result *models.AnalysisResult) map[string]any {
 	out := map[string]any{
 		"generated_at": time.Now().UTC(),

internal/server/raw_export_test.go

@@ -0,0 +1,46 @@
+package server
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestCollectLogTimeBounds(t *testing.T) {
+	lines := []string{
+		"2026-02-28T13:10:13.7442032Z Задача поставлена в очередь",
+		"not-a-timestamp line",
+		"2026-02-28T13:31:00.5077486Z Сбор завершен",
+	}
+
+	startedAt, finishedAt, ok := collectLogTimeBounds(lines)
+	if !ok {
+		t.Fatalf("expected bounds to be parsed")
+	}
+	if got := formatRawExportDuration(finishedAt.Sub(startedAt)); got != "20m47s" {
+		t.Fatalf("unexpected duration: %s", got)
+	}
+}
+
+func TestBuildHumanReadableCollectionLog_IncludesDurationHeader(t *testing.T) {
+	pkg := &RawExportPackage{
+		Format: rawExportFormatV1,
+		Source: RawExportSource{
+			Kind: "live_redfish",
+			CollectLogs: []string{
+				"2026-02-28T13:10:13.7442032Z Redfish: подключение к BMC...",
+				"2026-02-28T13:31:00.5077486Z Сбор завершен",
+			},
+		},
+	}
+
+	logText := buildHumanReadableCollectionLog(pkg, nil, "LOGPile test")
+	for _, token := range []string{
+		"Collection Started:",
+		"Collection Finished:",
+		"Collection Duration:",
+	} {
+		if !strings.Contains(logText, token) {
+			t.Fatalf("expected %q in log header", token)
+		}
+	}
+}