feat: add server modules (audit, upload, email, content, tracking)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/lib/server/audit.ts

@@ -0,0 +1,20 @@
+import { db } from './db';
+import { auditLog } from './schema';
+
+export async function logAudit(params: {
+	userId?: number;
+	action: string;
+	entity?: string;
+	entityId?: number;
+	diff?: Record<string, unknown>;
+	ipAddress?: string;
+}): Promise<void> {
+	await db.insert(auditLog).values({
+		userId: params.userId ?? null,
+		action: params.action,
+		entity: params.entity ?? null,
+		entityId: params.entityId ?? null,
+		diff: params.diff ?? null,
+		ipAddress: params.ipAddress ?? null
+	});
+}