参考所有分组，完成尽量多的内容。禁止顺手扩功能 smoke：锁定tooldata未激活DB语义

结论：按 LinuxCNC src/emc/tooldata/tooldata_db.cc 锁定 tooldata_db_getall() 未激活返回 -1、tooldata_db_notify() 未激活返回 0 的 WASM shim 探针与 source-map 守卫；不启用外部 DB 服务，不扩展 smoke 解析。

docs/linuxcnc-tooldata-source-map.md

@@ -15,6 +15,9 @@ source-link/shim guard only; it must not add CNC behavior and must not expand th
 - `src/emc/tooldata/tooldata_nml.cc` provides the NML tool table registration
   backend selected by `TOOL_NML_FLAG`.
 - `src/emc/tooldata/tooldata_db.cc` provides external database entry points.
+- `src/emc/tooldata/tooldata_db.cc` returns `-1` from
+  `tooldata_db_getall()` when the external DB is not live, and returns `0`
+  from `tooldata_db_notify()` without side effects in that same state.
 - `src/emc/tooldata/tool_mmap_read.cc` and `src/emc/tooldata/tool_watch.cc` are
   utility sources from the same LinuxCNC tooldata build metadata.
 - `src/emc/tooldata/tooldata.hh` declares the tooldata API used by RS274 and
@@ -40,6 +43,8 @@ source-link/shim guard only; it must not add CNC behavior and must not expand th
   they must not become browser API fields or generated switchkins aliases.
 - WASM-safe tooldata shims must preserve the LinuxCNC export surface checked by
   symbol probes.
+- WASM-safe tooldata runtime stubs must keep external database services
+  unavailable while preserving LinuxCNC inactive-DB return values.
 - Native and source-link paths must keep the full LinuxCNC `src/emc/tooldata`
   source directory tracked in the native RS274 manifest.
 - `build-wasm.sh` must run tooldata link and symbol probes before copying