fix(hub): repair v24 migration test fixture

hub/src/store/migration-v24.test.ts

@@ -64,6 +64,9 @@ describe('schema migration v23 to v26', () => {
         new Store(dbPath).close()
         const legacy = new Database(dbPath)
         legacy.exec(`
+            -- V26/V27 indexes depend on delivery_state and did not exist in V24.
+            DROP INDEX idx_messages_immediate_queued;
+            DROP INDEX idx_messages_future_scheduled_queued;
             ALTER TABLE messages DROP COLUMN delivery_state;
             PRAGMA user_version = 24;
         `)
@@ -73,8 +76,13 @@ describe('schema migration v23 to v26', () => {
         const internalDb = (migrated as unknown as { db: Database }).db
         const columns = internalDb.prepare('PRAGMA table_info(messages)').all() as Array<{ name: string }>
         const version = internalDb.prepare('PRAGMA user_version').get() as { user_version: number }
+        const indexes = internalDb.prepare('PRAGMA index_list(messages)').all() as Array<{ name: string }>
         expect(columns.some((col) => col.name === 'delivery_state')).toBe(true)
         expect(version.user_version).toBe(28)
+        expect(indexes.map((index) => index.name)).toEqual(expect.arrayContaining([
+            'idx_messages_immediate_queued',
+            'idx_messages_future_scheduled_queued'
+        ]))
         migrated.close()
     })
 })