Rebuild: schema for groups, rule sets, ranges, release catalog, chunk store, fragments, probe queue, rule bookkeeping and nodes

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

database/migrations/1770000000700_create_probe_candidates.ts

@@ -0,0 +1,25 @@
+import { BaseSchema } from '@adonisjs/lucid/schema'
+
+/**
+ * The probe queue (REBUILD.md, part 6): per release the few articles phase 2
+ * should read. Phase 1 only fills it.
+ */
+export default class extends BaseSchema {
+  async up() {
+    this.schema.createTable('probe_candidates', (table) => {
+      table.bigIncrements('id')
+      table.bigInteger('release_id').notNullable()
+      table.string('kind', 8).notNullable()
+      table.text('message_id').notNullable()
+      table.text('file').notNullable()
+      table.string('status', 8).notNullable().defaultTo('waiting')
+      table.timestamp('created_at', { useTz: true }).notNullable().defaultTo(this.now())
+      table.unique(['release_id', 'kind', 'message_id'])
+    })
+    this.schema.raw(`CREATE INDEX probe_candidates_waiting_idx ON probe_candidates (id) WHERE status = 'waiting'`)
+  }
+
+  async down() {
+    this.schema.dropTable('probe_candidates')
+  }
+}