The sidecar fold every 5 min inside a long par2 pass too

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

app/services/par2_merger.ts

@@ -18,6 +18,8 @@ const SLACK_FILES = 10
 const ROUND_MS = 60_000
 /** A round looks back this far past the previous one's start (rows committed while it ran). */
 const OVERLAP_MS = 60_000
+/** The sidecar fold also runs this often inside a long par2 pass: its queue grows by the settler's pace. */
+const FOLD_EVERY_MS = 5 * 60_000
 /** The merger's row in worker_cursors: the start of its last whole round, kept over a restart. */
 const CURSOR = 'merger'
 
@@ -108,6 +110,16 @@ export class Par2Merger {
     // First: sidecars (.nfo, .sfv, .nzb) apart from their upload join it. A queue, not since: it needn't wait for the
     // par2 pass (hours when that starts over).
     const folded = await this.folder.round()
+    let foldedAt = Date.now()
+    const foldAgain = async () => {
+      if (Date.now() - foldedAt < FOLD_EVERY_MS) return
+      const more = await this.folder.round()
+      folded.looked += more.looked
+      folded.sidecars += more.sidecars
+      folded.folded += more.folded
+      foldedAt = Date.now()
+      if (more.folded) logger.info(`Folded ${more.folded} sidecars into their uploads (${more.sidecars} sidecar-only of ${more.looked} small releases).`)
+    }
     const { rows } = await db.rawQuery(
       `SELECT set_id FROM par2_sets WHERE created_at >= ?
        UNION
@@ -117,6 +129,7 @@ export class Par2Merger {
     const round: MergeRound = { sets: rows.length, merges: 0, releases: 0, stems: 0, stemMerges: 0, stemReleases: 0, folded }
     for (const { set_id: setId } of rows) {
       if (this.stopped) return round
+      await foldAgain()
       // One set that fails doesn't hold up the others (nor the next round, which would start from the same point).
       const merged = await this.mergeSet(setId.trim()).catch((error) => {
         logger.error(`Par2 merge of set ${setId.trim()} failed: ${error.message}`)