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/1770000000500_create_release_chunks.ts

@@ -0,0 +1,34 @@
+import { BaseSchema } from '@adonisjs/lucid/schema'
+import env from '#start/env'
+
+/**
+ * The chunk store (REBUILD.md, part 3; decision a): one write-once row per
+ * release per batch, its files encoded by lib/chunks. Partitioned by month
+ * of writing, in CHUNK_TABLESPACE (the HDD) when set; ChunkPartitions keeps
+ * the next months' partitions ready. A re-run of a range replaces its chunks
+ * (by range_id).
+ */
+export default class extends BaseSchema {
+  async up() {
+    const tablespace = env.get('CHUNK_TABLESPACE')
+    const where = tablespace ? ` TABLESPACE ${tablespace}` : ''
+    this.schema.raw(`
+      CREATE TABLE release_chunks (
+        id bigserial,
+        release_id bigint NOT NULL,
+        range_id bigint NOT NULL,
+        batch_seq integer NOT NULL,
+        files integer NOT NULL,
+        segments integer NOT NULL,
+        payload bytea NOT NULL,
+        created_at timestamptz NOT NULL DEFAULT now(),
+        PRIMARY KEY (id, created_at)
+      ) PARTITION BY RANGE (created_at)${where}`)
+    this.schema.raw(`CREATE INDEX release_chunks_release_idx ON release_chunks (release_id)`)
+    this.schema.raw(`CREATE INDEX release_chunks_range_idx ON release_chunks (range_id)`)
+  }
+
+  async down() {
+    this.schema.raw(`DROP TABLE IF EXISTS release_chunks CASCADE`)
+  }
+}