feat(services): register workflow-native driver keys in field registry

Workflow reconciliation (see previous commit) showed the 20261022
state variable really stores person identity under driver{i}ID /
driver{i}Phonenumber (x2), while the API get_info group keys
(sfzmhm{i}/sjhm{i}) have zero references in any workflow version -
the legacy group read always returned empty for workflow-produced data.

- registry: +4 keys (driver1/2ID, driver1/2Phonenumber) in
  human1/human2 groups, SENSITIVE, documented as synonymous with
  sfzmhm{i}/sjhm{i}; 24 -> 28 specs
- driver{i}License deliberately NOT registered: the sandbox reads
  state.hphm{i} and only renames the output for confirmation prompts -
  it is not a state key, set_info rejects it as unknown (workflow
  never consumes it)
- intentional diff documented: acdhuman1/2 group output now includes
  the driver keys (legacy FastGPT output did not) - fixes the legacy
  'workflow person data unreadable by group' gap; synonym merging
  (driver1ID vs sfzmhm1) deferred pending caller confirmation
- tests: registry size 28, driver keys present with sensitive level,
  License alias excluded

Verified: 230 unit tests

docs/assignment6-compat.md

@@ -56,12 +56,23 @@
 ### 对账发现的一个真实差异
 
 20261022 workflow 的 `state` 变量中人员信息键为
-`driver1ID / driver1License / driver1Phonenumber`（×2），
+`driver1ID / driver1Phonenumber`（×2，sandbox 另把 `hphm1/2`
+车牌改名 `driver{i}License` 输出给确认提示词——该名不是 state 键），
 与 API `get_info` 分组键（`sfzmhm1/sjwh1/sjhm1` 等）**不同名**。
 旧 FastGPT 实现按 API 分组键读 state，这些键在 workflow state 中
-本就读空——属于既有行为。新后端注册表沿用了 API 契约键
-（保证 get/set_info 自洽），workflow 侧键名差异已列入审计：
-若线上有调用方依赖 `driver1ID` 等键，需决定是否补登记别名。
+本就读空——属于既有行为。
+
+**处理（2026-10-22 已落地）**：注册表把 workflow 原生键
+`driver{i}ID / driver{i}Phonenumber`（×2，同义 sfzmhm/sjhm）
+登记进 human1/human2 分组——
+- set/get_info 单键直读写 driver 系键与旧 API 行为一致；
+- **有意差异**：`acdhuman1/2` 分组输出现包含 driver 系键
+  （旧 FastGPT 分组输出没有它们）。调用方按 JSON 取键，多键无害；
+  这修正了旧实现"workflow 真实人员数据无法分组读到"的问题；
+- `driver{i}License` 非 state 键，对其 set_info 按未知键拒绝
+  （workflow 不消费它）；
+- 同义键（driver1ID vs sfzmhm1）暂不合并：合并需调用方确认
+  实际使用侧后作为后续优化，已列入审计项。
 
 ## 待审计项（作业 6-7 要求的后续工作）