voyager 3: the batch store writes releases once, by id references and bytea keys

Each release chunk is a release inserted once: release_key the SHA-1 of
the identity, the owner group and the first article (deterministic; no
numbering under a group lock), identity_key the identity's SHA-1 bytes,
poster_id and group_set_id through catalog_refs (cached per process),
source as a code (weak-stem added), the name into release_texts. A
finished release's candidates are claimable at once; a provisional tail
release is finished by a later chunk of its key, a finished one sent again
is left alone. Gone: joins into earlier releases and across groups, key
numbering, the group lock, the fragment merger. Interim: chunks, counts
and samples keyed by ranges.block_id, a range without a block gets one.

Readers follow: search (posters and group_sets joined, words through
release_texts, posters by id, source by code), the par2 merger, the
sidecar folder, the judge's scraped rule, the spot inspector, the spotter,
the NZB service, releases:regroup, edge:bench. Tests insert fixtures
through tests/functional/helpers/releases.ts; the suites pass again.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

app/services/spotter.ts

@@ -1,5 +1,6 @@
 import db from '@adonisjs/lucid/services/db'
 import logger from '@adonisjs/core/services/logger'
+import { SOURCES } from '#lib/release/source'
 import env from '#start/env'
 import coordinatorConfig from '#config/coordinator'
 import { MissingArticle, XoverClient } from '#lib/nntp/index'
@@ -183,7 +184,7 @@ export class Spotter {
       await trx.from('release_spots').where('spot_id', targetId).delete()
       await trx.from('release_passwords').where('spot_id', targetId).delete()
       // A release the spot made of its own goes with it.
-      if (target.release_id) await trx.from('releases').where('id', target.release_id).where('source', 'spot').delete()
+      if (target.release_id) await trx.from('releases').where('id', target.release_id).where('source', SOURCES.spot).delete()
     })
     logger.info(`Spot "${target.title}" removed by ${personal ? 'its poster' : 'a moderator'}.`)
   }