Fix milestone publisher and social previews

src/app/(main)/api/internal/social-milestones/route.ts

@@ -42,7 +42,13 @@ export async function GET(request: NextRequest) {
   if (dryRun) return NextResponse.json({ milestone: { id: milestone.id, text: milestone.consentText, shareUrl }, dryRun: true });
 
   const claimed = await db.$transaction(async (tx) => {
-    await tx.$queryRawUnsafe('SELECT pg_advisory_xact_lock(920241)');
+    // The blocking advisory-lock function returns PostgreSQL `void`, which
+    // Prisma cannot deserialize. The try variant returns a real boolean and
+    // keeps the lock scoped to this transaction.
+    const [lock] = await tx.$queryRaw<Array<{ acquired: boolean }>>`
+      SELECT pg_try_advisory_xact_lock(920241) AS acquired
+    `;
+    if (!lock?.acquired) return 0;
     const result = await tx.socialMilestone.updateMany({
       where: { id: milestone.id, brandStatus: 'approved' }, data: { brandStatus: 'processing', claimedAt: new Date() },
     });