👤 feat: User ID in Model Query; chore: cleanup ModelService (#1753)

* feat: send the LibreChat user ID as a query param when fetching the list of models

* chore: update bun

* chore: change bun command for building data-provider

* refactor: prefer use of `getCustomConfig` to access custom config, also move to `server/services/Config`

* refactor: make endpoints/custom option for the config optional, add userIdQuery, and use modelQueries log store in ModelService

* refactor(ModelService): use env variables at runtime, use default models from data-provider, and add tests

* docs: add `userIdQuery`

* fix(ci): import changed

api/server/services/Config/getCustomConfig.js

@@ -0,0 +1,25 @@
+const { CacheKeys } = require('librechat-data-provider');
+const loadCustomConfig = require('./loadCustomConfig');
+const getLogStores = require('~/cache/getLogStores');
+
+/**
+ * Retrieves the configuration object
+ * @function getCustomConfig
+ * @returns {Promise<TCustomConfig | null>}
+ * */
+async function getCustomConfig() {
+  const cache = getLogStores(CacheKeys.CONFIG_STORE);
+  let customConfig = await cache.get(CacheKeys.CUSTOM_CONFIG);
+
+  if (!customConfig) {
+    customConfig = await loadCustomConfig();
+  }
+
+  if (!customConfig) {
+    return null;
+  }
+
+  return customConfig;
+}
+
+module.exports = getCustomConfig;