Voyager 3 schema: the slim catalog (migration 6000, the reset) and blocks (6100)

releases rebuilt without its text copies: poster_id, group_set_id,
bytea keys, source smallint, edge, settled_at as the finish. posters by
id, group_sets. blocks as the lease unit, ranges.block_id. fragments,
range_blocks, release_final, the settler and the fragment merger gone;
release_chunks, rule_counts and rule_samples keyed by block. Cold tables
on CHUNK_TABLESPACE. Migration 6000 truncates the catalog and refuses
without VOYAGER3_RESET=1.

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

app/services/par2_pruner.ts

@@ -75,7 +75,7 @@ export class Par2Pruner {
                   WHERE o.set_id = b.set_id AND v.release_id IS NULL) THEN 'judged'
            WHEN NOT EXISTS (SELECT 1 FROM par2_sets s WHERE s.set_id = b.set_id AND s.created_at > ?)
             AND NOT EXISTS (SELECT 1 FROM par2_sets s JOIN releases r ON r.id = s.release_id WHERE s.set_id = b.set_id AND (
-                  release_final(r.group_id, r.first_article, r.last_article, r.posted_at, r.last_posted_at, r.complete) IS NOT TRUE
+                  r.settled_at IS NULL
                   OR EXISTS (SELECT 1 FROM recent x WHERE x.group_id = r.group_id
                     AND x.posted_low <= coalesce(r.last_posted_at, r.posted_at) + interval '6 hours' AND x.posted_high >= r.posted_at - interval '6 hours')))
             AND NOT EXISTS (SELECT 1 FROM par2_files f JOIN unseen u ON u.hash16k = f.hash16k AND u.size = f.length WHERE f.set_id = b.set_id)