fix: wrap entire invite POST handler in top-level try-catch

Catches errors from the circle_members SELECT query and auth
that were escaping the narrower try-catch and returning empty 500s.

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

src/app/api/circles/[id]/invite/route.ts

@@ -8,6 +8,7 @@ export async function POST(
   _req: Request,
   { params }: { params: Promise<{ id: string }> }
 ) {
+  try {
     const auth = await requireFamily();
     if (!auth.success) return NextResponse.json({ error: auth.error }, { status: auth.status });
 
@@ -27,7 +28,6 @@ export async function POST(
     const token     = randomBytes(32).toString("hex");
     const expiresAt = new Date(Date.now() + 7 * 24 * 60 * 60 * 1000); // 7 days
 
-  try {
     const [invite] = await sql.unsafe(
       `INSERT INTO circle_invites (circle_id, token, created_by, expires_at)
        VALUES ($1, $2, $3, $4)