🔃 refactor: Decouple Effects from AppService, move to data-schemas (#9974)

* chore: linting for `loadCustomConfig`

* refactor: decouple CDN init and variable/health checks from AppService

* refactor: move AppService to packages/data-schemas

* chore: update AppConfig import path to use data-schemas

* chore: update JsonSchemaType import path to use data-schemas

* refactor: update UserController to import webSearchKeys and redefine FunctionTool typedef

* chore: remove AppService.js

* refactor: update AppConfig interface to use Partial<TCustomConfig> and make paths and fileStrategies optional

* refactor: update checkConfig function to accept Partial<TCustomConfig>

* chore: fix types

* refactor: move handleRateLimits to startup checks as is an effect

* test: remove outdated rate limit tests from AppService.spec and add new handleRateLimits tests in checks.spec

packages/api/src/app/limits.ts

@@ -0,0 +1,55 @@
+import { RateLimitPrefix } from 'librechat-data-provider';
+import type { TCustomConfig } from 'librechat-data-provider';
+
+/**
+ *
+ * @param rateLimits
+ */
+export const handleRateLimits = (rateLimits?: TCustomConfig['rateLimits']) => {
+  if (!rateLimits) {
+    return;
+  }
+
+  const rateLimitKeys = {
+    fileUploads: RateLimitPrefix.FILE_UPLOAD,
+    conversationsImport: RateLimitPrefix.IMPORT,
+    tts: RateLimitPrefix.TTS,
+    stt: RateLimitPrefix.STT,
+  };
+
+  Object.entries(rateLimitKeys).forEach(([key, prefix]) => {
+    const rateLimit = rateLimits[key as keyof typeof rateLimitKeys];
+    if (rateLimit) {
+      setRateLimitEnvVars(prefix, rateLimit);
+    }
+  });
+};
+
+type RateLimitConfig = {
+  ipMax?: number | undefined;
+  ipWindowInMinutes?: number | undefined;
+  userMax?: number | undefined;
+  userWindowInMinutes?: number | undefined;
+};
+
+/**
+ * Set environment variables for rate limit configurations
+ *
+ * @param prefix - Prefix for environment variable names
+ * @param rateLimit - Rate limit configuration object
+ */
+const setRateLimitEnvVars = (prefix: string, rateLimit: RateLimitConfig) => {
+  const envVarsMapping = {
+    ipMax: `${prefix}_IP_MAX`,
+    ipWindowInMinutes: `${prefix}_IP_WINDOW`,
+    userMax: `${prefix}_USER_MAX`,
+    userWindowInMinutes: `${prefix}_USER_WINDOW`,
+  };
+
+  Object.entries(envVarsMapping).forEach(([key, envVar]) => {
+    const value = rateLimit[key as keyof RateLimitConfig];
+    if (value !== undefined) {
+      process.env[envVar] = value.toString();
+    }
+  });
+};