Rebuild: coordinator (planner, NNTP pool, spool, prefetcher, leases, rule sets), node API and the edge:node worker

- groups:add / ranges:plan / nodes:create / coordinator:run commands
- the node API: lease, the range's chunks as one framed stream from the
  spool, batches, heartbeat, finish, release (node guard, token per node)
- edge:node: needs COORDINATOR_URL and NODE_TOKEN only (placeholders for
  the rest), posts a batch every 10 chunks, gives its range back on SIGTERM
- releases are gathered per batch: 1.04 chunk rows per release at 10
  chunks per batch (1.35 when built per XOVER chunk)
- partitions are checked per batch instead of remembered

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

bin/console.ts

@@ -11,6 +11,19 @@
 |
 */
 
+/**
+ * Edge workers (edge:node) have no database or web server: what start/env
+ * requires for those gets a placeholder, so a node's .env needs only the
+ * coordinator's URL and its token.
+ */
+if (process.argv[2] === 'edge:node') {
+  const placeholders: Record<string, string> = {
+    NODE_ENV: 'production', PORT: '0', HOST: '127.0.0.1', LOG_LEVEL: 'info', APP_KEY: 'edge-node-has-no-app-key-0000000000', APP_URL: 'http://127.0.0.1',
+    SESSION_DRIVER: 'memory', DB_HOST: '127.0.0.1', DB_PORT: '5432', DB_USER: 'none', DB_DATABASE: 'none',
+  }
+  for (const [key, value] of Object.entries(placeholders)) process.env[key] ??= value
+}
+
 await import('reflect-metadata')
 const { Ignitor, prettyPrintError } = await import('@adonisjs/core/ignitor')