feat: Crypto.com-Client und Backfill-Script

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/server/scripts/backfill.ts

@@ -0,0 +1,34 @@
+import { PAIRS } from '../types';
+import { fetchCandles } from '../market/cryptocom';
+import { insertCandles, getCoverage } from '../market/candle-store';
+import { sql } from '../db/client';
+
+const M15 = 15 * 60 * 1000;
+const TARGET_MONTHS = 14;
+const since = Date.now() - TARGET_MONTHS * 30 * 24 * 60 * 60 * 1000;
+
+for (const pair of PAIRS) {
+  let endTs: number | undefined = undefined;
+  let total = 0;
+  for (;;) {
+    const batch = await fetchCandles(pair, '15m', 300, endTs);
+    if (batch.length === 0) break;
+
+    // Sanity: 15-min-Raster
+    for (const c of batch) {
+      if (c.ts % M15 !== 0) throw new Error(`${pair}: Timestamp ${c.ts} nicht im 15m-Raster — Konvention prüfen!`);
+    }
+    // Noch laufende Candle verwerfen
+    const closed = batch.filter((c) => c.ts + M15 <= Date.now());
+    await insertCandles(pair, closed);
+    total += closed.length;
+
+    const oldest = Math.min(...batch.map((c) => c.ts));
+    if (oldest <= since) break;
+    endTs = oldest - 1;
+    await Bun.sleep(200); // Rate-Limit-Schonung
+  }
+  const cov = await getCoverage(pair);
+  console.log(`${pair}: +${total} Candles, Coverage ${cov.from?.toISOString()} → ${cov.to?.toISOString()} (${cov.count})`);
+}
+await sql.end();