fix: make squad sync opt-in to prevent OOM in scheduled runs

The squads Wikipedia page for 48 teams is very large and was causing the
scheduled sync to be OOM-killed (exit 137) mid-run. Squad data doesn't
change during the tournament, so it doesn't need to run on every sync.
Pass --squads to include it when needed (e.g. initial setup).

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

scripts/sync.ts

@@ -204,7 +204,8 @@ async function run() {
     goalCount += goals.length
   }
 
-  // Squads (fetch once; idempotent upsert so safe to re-run)
+  // Squads — opt-in only (large page, causes OOM in scheduled runs)
+  if (process.argv.includes('--squads')) {
     const squadHtml = await fetchWikiHtml('2026_FIFA_World_Cup_squads')
     if (squadHtml) {
       const squads = scrapeSquads(squadHtml)
@@ -224,6 +225,7 @@ async function run() {
       }
       console.log(`  Squads: ${squads.length} teams`)
     }
+  }
 
   // Tournament winner (once the final is played)
   if (meta.winner) {