feat: işlenmiş ham kayıtları 24 saat sonra otomatik sil

PRD'nin auto-purge lifecycle'ı: RawSegment analiz tamamlanmış
(PROCESSED/DISCARDED) ve hiçbir candidate'i PENDING_STT'de değilse
(yani hâlâ transkribe edilmeyi bekleyen yoksa) 24 saatten (yapılandırı-
labilir: RAW_SEGMENT_TTL_HOURS) eskiyse DB kaydı + dosyası siliniyor.
Saatlik kontrol ediliyor, api-daemon başlarken de bir kere çalışıyor.

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

apps/api-daemon/src/cleanup.ts

@@ -0,0 +1,41 @@
+import { unlink } from "node:fs/promises";
+import { prisma } from "@streamclipper/db";
+import { env } from "./env";
+
+const CHECK_INTERVAL_MS = 60 * 60 * 1000; // hourly
+
+/**
+ * PRD's auto-purge lifecycle: processed raw recordings get deleted 24h after
+ * capture. Only segments that are done being analyzed (PROCESSED/DISCARDED)
+ * and have no candidate still waiting on STT are eligible — deleting a raw
+ * file mid-analysis or mid-transcription would break the pipeline for it.
+ */
+async function cleanupOnce(): Promise<void> {
+  const cutoff = new Date(Date.now() - env.rawSegmentTtlHours * 60 * 60 * 1000);
+
+  const staleSegments = await prisma.rawSegment.findMany({
+    where: {
+      createdAt: { lt: cutoff },
+      status: { in: ["PROCESSED", "DISCARDED"] },
+      candidates: { none: { status: "PENDING_STT" } },
+    },
+  });
+
+  for (const segment of staleSegments) {
+    await prisma.candidateSegment.deleteMany({ where: { rawSegmentId: segment.id } });
+    await prisma.rawSegment.delete({ where: { id: segment.id } });
+    await unlink(segment.filePath).catch(() => {});
+  }
+
+  if (staleSegments.length > 0) {
+    console.log(`[cleanup] removed ${staleSegments.length} raw segment(s) older than ${env.rawSegmentTtlHours}h`);
+  }
+}
+
+export function startCleanupLoop(): NodeJS.Timeout {
+  console.log(`[cleanup] checking every ${CHECK_INTERVAL_MS}ms, TTL ${env.rawSegmentTtlHours}h`);
+  cleanupOnce().catch((err) => console.error("[cleanup] initial run failed:", err));
+  return setInterval(() => {
+    cleanupOnce().catch((err) => console.error("[cleanup] run failed:", err));
+  }, CHECK_INTERVAL_MS);
+}