feat(numbers): add number sequences store; restrict companysetting keys

- Add `numbers` store module with `list` and `update` methods backed by
  the `numbers` table (prefix, padding, next) per company.
- Add sql queries LIST_BY_COMPANY, GET_BY_COMPANY_AND_ID, UPDATE_...
- Regenerate and wire API docs for `numbers`.

companysetting:
- Remove the `delete` endpoint (settings are now upsert/read only).
- Restrict `set` to a fixed allow-list of keys:
  ui.theme, keys.tavily, keys.openrouter, labelprinter.addr, labelprinter.type.
- Drop DELETE_BY_COMPANY_AND_KEY sql and the delete store file.

Docs: update README, API.md, API.companysetting.md, API.numbers.md.

src/index.js

@@ -35,7 +35,6 @@ import unitDelete from './store/unit/delete.js';
 import companysettingList from './store/companysetting/list.js';
 import companysettingGet from './store/companysetting/get.js';
 import companysettingSet from './store/companysetting/set.js';
-import companysettingDelete from './store/companysetting/delete.js';
 import brandList from './store/brand/list.js';
 import brandUpsert from './store/brand/upsert.js';
 import brandDelete from './store/brand/delete.js';
@@ -104,6 +103,8 @@ import googleAuthSetSelectedCompany from './store/google_auth/setSelectedCompany
 import googleAuthSetProfile from './store/google_auth/setProfile.js';
 import picGetImageByHash from './store/pic/getImageByHash.js';
 import picGetThumbByHash from './store/pic/getThumbByHash.js';
+import numbersList from './store/numbers/list.js';
+import numbersUpdate from './store/numbers/update.js';
 import storePurge from './store/purge.js';
 import storeInitialize from './store/initialize.js';
 
@@ -179,7 +180,6 @@ export default class LibDashStore {
       list: companysettingList(pool),
       get: companysettingGet(pool),
       set: companysettingSet(pool),
-      delete: companysettingDelete(pool),
     };
 
     this.brand = {
@@ -277,6 +277,11 @@ export default class LibDashStore {
       getThumbByHash: picGetThumbByHash(pool),
     };
 
+    this.numbers = {
+      list: numbersList(pool),
+      update: numbersUpdate(pool),
+    };
+
     this.purge = storePurge(pool);
     this.initialize = storeInitialize(pool);