Seed orchestrator: remote nodes lease ranges and post results over HTTPS

- seed_nodes (hashed bearer tokens) and seed_ranges (planned ranges with
  lease, resume point and counts); migration …140.
- SeedOrchestrator: lease (oldest plan first, FOR UPDATE SKIP LOCKED; a
  lease without a batch for 15 min passes to the next node and resumes at
  next_id), batch (stores files and fragments, moves next_id), finish,
  release, plan (from below live indexing / the backfill / earlier plans
  down to N days back; takes over the group's backfill), status.
- Seed API under /api/v1/seed (lease, ranges/:id/batches|done|release,
  status) behind a node-token middleware; JSON bodies up to 64 MB after
  gzip.
- seed:node runs a node: no database or Redis, outgoing HTTPS only, N
  connections, gzip batches, retries for network errors and 5xx, drops a
  range on 409, gives its ranges back on SIGTERM. seed-node/ has a compose
  file that builds the image from this repository.
- seed:token, seed:plan, seed:status for the operator. Header parsing moved
  to lib/ingest and the range loop to lib/seed/runner, shared by seed:range
  and seed:node.

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

commands/SeedPlan.ts

@@ -0,0 +1,41 @@
+import { BaseCommand, args, flags } from '@adonisjs/core/ace'
+import { CommandOptions } from '@adonisjs/core/types/ace'
+import NntpService from '#services/NntpService'
+import SeedOrchestrator from '#services/SeedOrchestrator'
+
+/**
+ * Plans seed ranges (CONCEPT.md D38) for groups, from below what live
+ * indexing, the backfill and earlier plans cover down to `--days` back (or
+ * the server's oldest article). A group's backfill stops where its plan
+ * starts. Ranges are interleaved across groups, newest first.
+ *
+ *   node ace seed:plan alt.binaries.ath alt.binaries.mom --days 365
+ */
+export default class SeedPlan extends BaseCommand {
+  public static commandName = 'seed:plan'
+  public static description = 'Plans article ranges of groups for seeding nodes to lease.'
+
+  public static options: CommandOptions = {
+    startApp: true,
+  }
+
+  @args.spread({ description: 'Groups' })
+  declare groups: string[]
+
+  @flags.number({ description: 'How many days back (default: everything the server has)' })
+  declare days?: number
+
+  @flags.number({ description: 'Articles per range', default: 2_000_000 })
+  declare size: number
+
+  public async run() {
+    try {
+      const summary = await SeedOrchestrator.plan(this.groups, { days: this.days, size: this.size })
+      for (const s of summary) {
+        this.logger.info(`${s.group}: ${s.ranges.toLocaleString('en')} ranges, articles ${s.from.toLocaleString('en')}–${s.to.toLocaleString('en')}.`)
+      }
+    } finally {
+      await NntpService.shutdown()
+    }
+  }
+}