Seed leases respect the backfill's disk limits

No new range while the database's NVMe part or the hdd tablespace is over
BACKFILL_MAX_NVME_GB / BACKFILL_MAX_HDD_GB; nodes ask again a minute later.
seed:status says when leasing is paused. The NVMe part was at 47 GB of 50
with a plan for all of a.b.ath queued.

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

tests/functional/seed_api.spec.ts

@@ -4,6 +4,7 @@ import db from '@adonisjs/lucid/services/db'
 import testUtils from '@adonisjs/core/services/test_utils'
 import SeedOrchestrator from '#services/SeedOrchestrator'
 import QueueService from '#services/QueueService'
+import indexerConfig from '#config/indexer'
 import { segmentFromHeader } from '#lib/ingest/segment'
 import { FileAggregator } from '#lib/aggregate/index'
 import { toFragment, toSeedFile, type SeedBatch } from '#lib/seed/wire'
@@ -74,4 +75,17 @@ test.group('Seed API', (group) => {
     ;(await client.post(`/api/v1/seed/ranges/${range.id}/release`).headers({ authorization: `Bearer ${second}` }).json({ error: 'test' })).assertStatus(200)
     assert.equal((await db.from('seed_ranges').where('id', range.id).first()).status, 'queued')
   })
+
+  test('no leases while the database is over the disk limit', async ({ client }) => {
+    const token = await SeedOrchestrator.issueToken('full-disk')
+    await db.table('seed_ranges').insert({ group_name: 'alt.binaries.test', start_id: 1, end_id: 100, next_id: 1 })
+    const limit = indexerConfig.backfill.maxDefaultGb
+    indexerConfig.backfill.maxDefaultGb = 0
+    try {
+      ;(await client.post('/api/v1/seed/lease').headers({ authorization: `Bearer ${token}` })).assertStatus(204)
+    } finally {
+      indexerConfig.backfill.maxDefaultGb = limit
+    }
+    ;(await client.post('/api/v1/seed/lease').headers({ authorization: `Bearer ${token}` })).assertStatus(200)
+  })
 })