chore(qa,objectql): drop dogfood's unconsumed driver-memory devDep + de-reference driver-memory in one stub comment (#5829)

#5704 收口尾单(批次 2/3 已合入 PR #5797/#5806),两件留档尾项:

1. `packages/qa/dogfood` 的 `@objectstack/driver-memory` devDep：#5715(批次 0)
   把 read-coercion 一致性测试的 memory 臂移除后，全包已零真实 import
   (`git grep -in memory -- packages/qa/dogfood` 只剩 README 的
   "in-memory SQLite" 散文与 read-coercion-conformance.test.ts:9 记录移除原因的
   注释)。摘除声明 + lockfile 随动(仅该一条 importer 链接)。

2. `protocol-batch-atomic.test.ts` 的 `makeSnapshotDriver()` 头注释把这个本地
   手写 stub 说成「the same shape driver-memory uses」——packages/objectql 根本
   不依赖 driver-memory，这类措辞正是 #5704 Phase 1 survey 里让 `grep -i memory`
   虚高的来源。按 #5797 同款原则改写为指涉 stub 自身。

`protocol-data.test.ts:759` 经复核**原样保留**：那一句
「Mirror of #3948's rule for driver-memory: an unapplied filter must not look
like a satisfied one」指的是真实 driver-memory 包里真实存在的不变量
(`filter-refusal.ts`、`memory-driver.ts:753/792/817`、
`memory-filter-ast-vocabulary.test.ts`)，属于 #5797 已开的例外类
(描述真实驱动族行为的散文一律保留)，不是把 stub 说成 driver-memory。

零行为变更。

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WyvqvKMG6asi9aXjKE6xtx

Author: claude

packages/objectql/src/protocol-batch-atomic.test.ts

@@ -18,9 +18,9 @@ import { ObjectStackProtocolImplementation } from '@objectstack/metadata-protoco
 import type { IObjectQLEngine } from '@objectstack/spec/contracts';
 
 /**
- * A driver with real transaction semantics: `beginTransaction` snapshots every
- * table, `rollback` restores the snapshot wholesale, `commit` drops it — the
- * same shape `driver-memory` uses, small enough to assert against.
+ * A stub driver with real transaction semantics: `beginTransaction` snapshots
+ * every table, `rollback` restores the snapshot wholesale, `commit` drops it —
+ * a genuine rollback, small enough to assert against.
  */
 function makeSnapshotDriver() {
     const stores = new Map<string, Map<string, any>>();

packages/qa/dogfood/package.json

@@ -34,7 +34,6 @@
   },
   "devDependencies": {
     "@objectstack/core": "workspace:*",
-    "@objectstack/driver-memory": "workspace:*",
     "@objectstack/driver-sql": "workspace:*",
     "@objectstack/driver-sqlite-wasm": "workspace:*",
     "@types/node": "^26.1.2",