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/1770000000300_create_ranges.ts

@@ -0,0 +1,38 @@
+import { BaseSchema } from '@adonisjs/lucid/schema'
+
+/**
+ * A group's history in leasable pieces (REBUILD.md, coordinator):
+ * planned → (spooled by the prefetcher) → leased → done. `next_id` is the
+ * resume point: everything before it has been stored.
+ */
+export default class extends BaseSchema {
+  async up() {
+    this.schema.createTable('ranges', (table) => {
+      table.bigIncrements('id')
+      table.integer('group_id').notNullable().references('id').inTable('groups').onDelete('CASCADE')
+      table.bigInteger('start_id').notNullable()
+      table.bigInteger('end_id').notNullable()
+      table.bigInteger('next_id').notNullable()
+      table.string('status', 8).notNullable().defaultTo('planned')
+      // Lower first; the coordinator plans the oldest era first.
+      table.integer('priority').notNullable().defaultTo(0)
+      table.integer('rule_version').nullable()
+      table.integer('node_id').nullable()
+      table.integer('attempts').notNullable().defaultTo(0)
+      // Chunks of this range in the spool (prefetch); all of them when spooled_at is set.
+      table.integer('spooled_chunks').notNullable().defaultTo(0)
+      table.timestamp('spooled_at', { useTz: true }).nullable()
+      table.timestamp('leased_at', { useTz: true }).nullable()
+      table.timestamp('heartbeat_at', { useTz: true }).nullable()
+      table.timestamp('done_at', { useTz: true }).nullable()
+      table.bigInteger('headers').notNullable().defaultTo(0)
+      table.text('error').nullable()
+      table.unique(['group_id', 'start_id'])
+    })
+    this.schema.raw(`CREATE INDEX ranges_todo_idx ON ranges (priority, id) WHERE status IN ('planned', 'leased')`)
+  }
+
+  async down() {
+    this.schema.dropTable('ranges')
+  }
+}