sync file-type support across upload/convert and fix collected_at timezone handling

internal/server/raw_export_test.go

@@ -1,8 +1,12 @@
 package server
 
 import (
+	"archive/zip"
+	"bytes"
+	"encoding/json"
 	"strings"
 	"testing"
+	"time"
 )
 
 func TestCollectLogTimeBounds(t *testing.T) {
@@ -44,3 +48,54 @@ func TestBuildHumanReadableCollectionLog_IncludesDurationHeader(t *testing.T) {
 		}
 	}
 }
+
+func TestParseRawExportBundle_ExtractsCollectedAtHintFromParserFields(t *testing.T) {
+	pkg := &RawExportPackage{
+		Format:     rawExportFormatV1,
+		ExportedAt: time.Date(2026, 2, 25, 9, 59, 41, 479023400, time.UTC),
+		Source: RawExportSource{
+			Kind: "live_redfish",
+		},
+	}
+	pkgJSON, err := json.Marshal(pkg)
+	if err != nil {
+		t.Fatalf("marshal pkg: %v", err)
+	}
+
+	parserFields := []byte(`{"collected_at":"2026-02-25T09:58:05.9129753Z"}`)
+
+	var buf bytes.Buffer
+	zw := zip.NewWriter(&buf)
+
+	jf, err := zw.Create(rawExportBundlePackageFile)
+	if err != nil {
+		t.Fatalf("create package file: %v", err)
+	}
+	if _, err := jf.Write(pkgJSON); err != nil {
+		t.Fatalf("write package file: %v", err)
+	}
+
+	ff, err := zw.Create(rawExportBundleFieldsFile)
+	if err != nil {
+		t.Fatalf("create parser fields file: %v", err)
+	}
+	if _, err := ff.Write(parserFields); err != nil {
+		t.Fatalf("write parser fields file: %v", err)
+	}
+
+	if err := zw.Close(); err != nil {
+		t.Fatalf("close zip writer: %v", err)
+	}
+
+	gotPkg, ok, err := parseRawExportBundle(buf.Bytes())
+	if err != nil {
+		t.Fatalf("parse bundle: %v", err)
+	}
+	if !ok || gotPkg == nil {
+		t.Fatalf("expected valid raw export bundle")
+	}
+	want := time.Date(2026, 2, 25, 9, 58, 5, 912975300, time.UTC)
+	if !gotPkg.CollectedAtHint.Equal(want) {
+		t.Fatalf("expected collected_at hint %s, got %s", want, gotPkg.CollectedAtHint)
+	}
+}