A cap on the catalog's NVMe size: above it only the tail and the stored ranges

After reset 24 the catalog grew ~3.7 GB an hour (77 GB, root 31 GB free, 600k
history ranges to go). CATALOG_MAX_NVME_GB (as voyager 1's
BACKFILL_MAX_NVME_GB): once the default tablespace is over it, leases and the
prefetcher take priority < 0 only (the tail, the stored ranges); measured once
a minute. Off when unset; 90 on homelab.

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

app/services/leases.ts

@@ -3,6 +3,7 @@ import coordinatorConfig from '#config/coordinator'
 import RuleSets from '#services/rule_sets'
 import Spool from '#services/spool'
 import Corpus from '#services/corpus'
+import CatalogSpace from '#services/catalog_space'
 import type { Lease } from '#lib/edge/index'
 
 export class LeaseLost extends Error {}
@@ -19,12 +20,14 @@ export class LeaseLost extends Error {}
 class Leases {
   async lease(nodeId: number): Promise<Lease | null> {
     const rules = await RuleSets.current()
+    // The catalog at its cap on the NVMe: the tail and the stored ranges only (CatalogSpace).
+    const history = (await CatalogSpace.full()) ? 'AND priority < 0' : ''
     const take = (spooled: boolean) =>
       db.rawQuery(
         `UPDATE ranges r SET status = 'leased', node_id = ?, leased_at = now(), heartbeat_at = now(), attempts = attempts + 1, rule_version = ?
          WHERE r.id = (
            SELECT id FROM ranges
-           WHERE ${spooled ? 'spooled_chunks > 0' : 'true'} AND next_id <= end_id
+           WHERE ${spooled ? 'spooled_chunks > 0' : 'true'} AND next_id <= end_id ${history}
              AND (status = 'planned' OR (status = 'leased' AND heartbeat_at < now() - make_interval(secs => ?)))
            ORDER BY priority, id LIMIT 1 FOR UPDATE SKIP LOCKED)
          RETURNING r.id, r.group_id, r.start_id, r.end_id, r.next_id`,