The par2 prune gets 2 min per round (it held the merges back for hours); abandoned ranges past their end are finished

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

app/services/par2_pruner.ts

@@ -26,7 +26,12 @@ export interface PruneRound {
  * par2 reposted, whose probe writes the rows again; without rows its merge finds no files and the count check holds.
  */
 export class Par2Pruner {
-  async round(): Promise<PruneRound> {
+  /**
+   * Batches until done or `budgetMs` is spent (the cursor is saved per batch, the next round goes on from it): run
+   * from the merger's loop, a first round over two days of sets held the merges back for hours (LOG.md 2026-10-17 (72)).
+   */
+  async round(budgetMs = Infinity): Promise<PruneRound> {
+    const deadline = Date.now() + budgetMs
     const round: PruneRound = { complete: 0, judged: 0, rows: 0 }
     const saved = await db.from('worker_cursors').where('name', CURSOR).first()
     let since: Date = saved ? new Date(saved.at) : new Date(0)
@@ -55,8 +60,9 @@ export class Par2Pruner {
         `INSERT INTO worker_cursors (name, at) VALUES (?, ?) ON CONFLICT (name) DO UPDATE SET at = excluded.at`,
         [CURSOR, since]
       )
-      if (sets.length < BATCH) break
+      if (sets.length < BATCH || Date.now() > deadline) break
     }
+    if (Date.now() > deadline) return round
     // Judged: no cursor (verdicts come and go); only sets with rows left.
     const { rows: judged } = await db.rawQuery(
       `SELECT DISTINCT s.set_id FROM release_verdicts v JOIN par2_sets s ON s.release_id = v.release_id