feat: Add audit logging (#38189)

Co-authored-by: bircni <bircni@users.noreply.github.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

models/audit/audit_event_benchmark_test.go

@@ -0,0 +1,41 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package audit
+
+import (
+	"context"
+	"testing"
+
+	"gitea.dev/models/unittest"
+	"gitea.dev/modules/timeutil"
+)
+
+// BenchmarkInsertEvent measures the synchronous database cost added when audit
+// recording is enabled. Keep it separate from router benchmarks so it remains
+// comparable across changes to request handling.
+func BenchmarkInsertEvent(b *testing.B) {
+	if err := unittest.PrepareTestDatabase(); err != nil {
+		b.Fatal(err)
+	}
+
+	ctx := context.Background()
+	b.ReportAllocs()
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		event := &Event{
+			Action:        UserPassword,
+			ActorID:       1,
+			ActorName:     "actor",
+			ScopeType:     ScopeUser,
+			ScopeID:       2,
+			ScopeName:     "scope",
+			Origin:        OriginUI,
+			Metadata:      `{"source":"benchmark"}`,
+			TimestampUnix: timeutil.TimeStamp(i + 1),
+		}
+		if err := InsertEvent(ctx, event); err != nil {
+			b.Fatal(err)
+		}
+	}
+}