implemented a lot of features

database/migrations/1768620764810_exclude_legacy_conflicts_from_split.ts

@@ -0,0 +1,36 @@
+import { BaseSchema } from '@adonisjs/lucid/schema'
+
+/**
+ * Binaries that were flagged conflicted before part_conflicts existed lost
+ * their extra articles, so splitting them only reshuffles the first article
+ * per part number, a mix of different volumes. Mark them as never to be
+ * split, and remove the volumes and files the first splitter run made from
+ * them (see LOG.md, 2026-09-28).
+ */
+export default class extends BaseSchema {
+  async up() {
+    this.defer(async (db) => {
+      await db.rawQuery(`
+        WITH boundary AS (
+          SELECT migration_time FROM adonis_schema WHERE name LIKE '%1768620764790%'
+        ), legacy AS (
+          SELECT id FROM binaries
+          WHERE conflicted_at IS NOT NULL AND parent_binary_id IS NULL
+            AND conflicted_at < (SELECT migration_time FROM boundary)
+        ), instances AS (
+          SELECT id, file_id FROM binaries WHERE parent_binary_id IN (SELECT id FROM legacy)
+        ), deleted_files AS (
+          DELETE FROM files WHERE id IN (SELECT file_id FROM instances WHERE file_id IS NOT NULL)
+        ), deleted_instances AS (
+          DELETE FROM binaries WHERE id IN (SELECT id FROM instances)
+        )
+        -- 'infinity': last_seen_at > split_at is never true, so SplitService skips them.
+        UPDATE binaries SET split_at = 'infinity' WHERE id IN (SELECT id FROM legacy)
+      `)
+    })
+  }
+
+  async down() {
+    // The removed volumes were unverifiable; nothing to restore.
+  }
+}