Rebuild: settling quiet releases

Hourly in coordinator:run: a release unchanged for 6 hours is settled,
complete when every file its [i/N] counter announced was found, unknown
without a counter (phase 2 reads par2 sets for those). Partial index on
unsettled releases.

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

commands/coordinator_run.ts

@@ -4,6 +4,7 @@ import { setTimeout as sleep } from 'node:timers/promises'
 import { Prefetcher } from '#services/prefetcher'
 import Planner from '#services/planner'
 import FragmentMerger from '#services/fragment_merger'
+import Settler from '#services/settler'
 import NntpPool from '#services/nntp_pool'
 
 const TICK_MS = 2000
@@ -13,8 +14,8 @@ const MERGE_BUDGET_MS = 30 * 1000
 
 /**
  * The coordinator's background work (REBUILD.md, part 1): the prefetcher,
- * merging fragments of finished ranges every minute, and planning ranges
- * for new articles every hour. The API (leases, stream,
+ * merging fragments of finished ranges every minute, and every hour
+ * planning ranges for new articles and settling quiet releases. The API (leases, stream,
  * batches) runs in the web server.
  */
 export default class CoordinatorRun extends BaseCommand {
@@ -42,6 +43,8 @@ export default class CoordinatorRun extends BaseCommand {
           plannedAt = Date.now()
           const { groups, ranges } = await Planner.planAll()
           if (ranges > 0) this.logger.info(`Planned ${ranges} ranges over ${groups} groups.`)
+          const settled = await Settler.run()
+          if (settled > 0) this.logger.info(`Settled ${settled} releases.`)
         }
         if (Date.now() - mergedAt >= MERGE_EVERY_MS) {
           mergedAt = Date.now()