refactor: rename data/openfootball → data/wikipedia, drop data/kaggle

Move world_cup.csv to app/data/ directly (the only remaining Kaggle file
used by seed.ts for tournament metadata). Delete the rest of the Kaggle CSVs.
Update path constants in scrape-wikipedia.ts and seed.ts accordingly.

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

scripts/seed.ts

@@ -9,8 +9,7 @@ import { getIso } from '../lib/iso-codes'
 const DATABASE_URL = process.env.DATABASE_URL ?? 'postgres://wc:wc@localhost:5432/worldcup'
 const __dirname = path.dirname(fileURLToPath(import.meta.url))
 const DATA_DIR = path.join(__dirname, '../app/data')
-const KAGGLE_DIR = path.join(DATA_DIR, 'kaggle')
-const WC_DIR = path.join(DATA_DIR, 'openfootball')
+const WC_DIR = path.join(DATA_DIR, 'wikipedia')
 
 const YEARS = [
   1930,1934,1938,1950,1954,1958,1962,1966,1970,1974,
@@ -247,7 +246,7 @@ async function run() {
   }
 
   // 1. Tournaments from world_cup.csv (host, winner, runner_up)
-  const wcRows = parseCsv(readFileSync(path.join(KAGGLE_DIR, 'world_cup.csv'), 'utf-8'))
+  const wcRows = parseCsv(readFileSync(path.join(DATA_DIR, 'world_cup.csv'), 'utf-8'))
   for (const r of wcRows) {
     const year = parseInt(r['Year'])
     if (isNaN(year)) continue