fix: social_events API public + add availability table

- Make social_events GET endpoint public (was returning 401)
- Add WHERE active = TRUE filter to social_events query
- Create availability table for room date management

src/app/api/social_events/route.ts

@@ -4,17 +4,17 @@ import { db } from '@/lib/db';
 
 export async function GET() {
   try {
-    await requireRole('admin');
     const { rows } = await db.query(`
       SELECT se.*,
         (SELECT COUNT(*) FROM social_event_reservations ser WHERE ser.social_event_id = se.id) as reservation_count
       FROM social_events se
+      WHERE se.active = TRUE
       ORDER BY se.sort_order, se.date, se.id
     `);
     return NextResponse.json({ data: rows });
   } catch (error: any) {
     console.error('GET /api/social_events error:', error);
-    return NextResponse.json({ error: error.message || 'Unauthorized' }, { status: 401 });
+    return NextResponse.json({ error: error.message || 'Failed to fetch social events' }, { status: 500 });
   }
 }