Add company settings and number sequence API routes

- Add CompanySetting routes (list, get, set) backed by company-scoped store
- Add Number routes (list, update) for managing number sequences
- Register new store namespaces for numbers and companysetting
- Add CompanySetting and NumberSequence schemas to OpenAPI
- Regenerate API docs and index for the new routes

src/db/companysetting.js

@@ -0,0 +1,16 @@
+import { getStore } from './store.js';
+
+export async function list(googleAuthId, options) {
+    const store = await getStore();
+    return store.companysetting.list(googleAuthId, options);
+}
+
+export async function getByKey(googleAuthId, key, options) {
+    const store = await getStore();
+    return store.companysetting.get(googleAuthId, key, options);
+}
+
+export async function set(googleAuthId, input) {
+    const store = await getStore();
+    return store.companysetting.set(googleAuthId, input);
+}