Decide completeness by par2 set for releases without a counter

59% of settled releases had complete = NULL: without an [i/N] counter
the settler left it unknown, and the "phase 2 reads par2 sets for those"
step was never built. A release is now complete when every file its par2
sets describe is there by name or by its first-16-KiB hash, or, for an
upload renamed after its par2 was made, when it has as many non-par2
files and bytes. Decided when a par2 index is probed, after a par2 merge,
and before the pruner drops a set's file list; the batch store, settler
and merger keep a decided value instead of resetting it to NULL.
releases:par2-complete decides the releases probed before this.

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

app/services/par2_pruner.ts

@@ -1,4 +1,5 @@
 import db from '@adonisjs/lucid/services/db'
+import { decidePar2Completeness } from '#services/par2_completeness'
 
 /** A set this long past its last holder's par2 has had its merges: one posted later is a repost (decision d). */
 const SETTLED_MS = 2 * 86400_000
@@ -86,6 +87,11 @@ export class Par2Pruner {
       for (const reason of ['complete', 'judged', 'final'] as const) {
         const ids = done(reason)
         round[reason] += ids.length
+        // The holders' completeness while the file lists are there (app/services/par2_completeness.ts).
+        if (reason !== 'judged' && ids.length > 0) {
+          const { rows: holders } = await db.rawQuery(`SELECT DISTINCT release_id FROM par2_sets WHERE set_id = ANY(?::char(32)[])`, [ids])
+          await decidePar2Completeness(db, holders.map((h: { release_id: string }) => h.release_id))
+        }
         round.rows += await this.drop(ids)
       }
       // Past the last set: the next batch starts the next pass.