Garbage: retry a probe's apply once when a release it joins was deleted meanwhile

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

app/services/ContentService.ts

@@ -162,12 +162,14 @@ class ContentService {
     try {
       result = await this.applyProbe(task, probe)
     } catch (error: any) {
-      // Another probe of the release (its first volume, its par2) deleted it as garbage meanwhile:
-      // what this one found has nowhere to go (LOG.md 2026-10-08 (7)).
-      if (error.code === '23503' && !(await db.from('files').where('id', task.fileId).select('id').first())) {
+      // Another probe deleted a release this one writes to as garbage meanwhile (LOG.md 2026-10-08 (7)):
+      // the file's own release (nothing left to do), or one its par2 set joins (once more: the set
+      // then finds the release's files gone and makes its own).
+      if (error.code !== '23503') throw error
+      if (!(await db.from('files').where('id', task.fileId).select('id').first())) {
         return { named: 0, contentType: probe.contentType, garbage: 'deleted meanwhile' }
       }
-      throw error
+      result = await this.applyProbe(task, probe)
     }
     result.garbage = (await GarbageFilter.afterProbe(task.fileId, probe.contentType)) ?? undefined
     return result