⚗️ refactor: Provider File Validation with Configurable Size Limits (#10405)

* chore: correct type for ServerRequest

* chore: improve ServerRequest typing across several modules

* feat: Add PDF configured limit validation

- Introduced comprehensive tests for PDF validation across multiple providers, ensuring correct behavior for file size limits and edge cases.
- Enhanced the `validatePdf` function to accept an optional configured file size limit, allowing for stricter validation based on user configurations.
- Updated related functions to utilize the new validation logic, ensuring consistent behavior across different providers.

* chore: Update Request type to ServerRequest in audio and video encoding modules

* refactor: move `getConfiguredFileSizeLimit` utility

* feat: Add video and audio validation with configurable size limits

- Introduced `validateVideo` and `validateAudio` functions to validate media files against provider-specific size limits.
- Enhanced validation logic to consider optional configured file size limits, allowing for more flexible file handling.
- Added comprehensive tests for video and audio validation across different providers, ensuring correct behavior for various scenarios.

* refactor: Update PDF and media validation to allow higher configured limits

- Modified validation logic to accept user-configured file size limits that exceed provider defaults, ensuring correct acceptance of files within the specified range.
- Updated tests to reflect changes in validation behavior, confirming that files are accepted when within the configured limits.
- Enhanced documentation in tests to clarify expected outcomes with the new validation rules.

* chore: Add @types/node-fetch dependency to package.json and package-lock.json

- Included the @types/node-fetch package to enhance type definitions for node-fetch usage.
- Updated package-lock.json to reflect the addition of the new dependency.

* fix: Rename FileConfigInput to TFileConfig

packages/data-schemas/src/types/app.ts

@@ -1,6 +1,7 @@
 import type {
   TEndpoint,
   FileSources,
+  TFileConfig,
   TAzureConfig,
   TCustomConfig,
   TMemoryConfig,
@@ -82,7 +83,7 @@ export interface AppConfig {
   /** MCP server configuration */
   mcpConfig?: TCustomConfig['mcpServers'] | null;
   /** File configuration */
-  fileConfig?: TCustomConfig['fileConfig'];
+  fileConfig?: TFileConfig;
   /** Secure image links configuration */
   secureImageLinks?: TCustomConfig['secureImageLinks'];
   /** Processed model specifications */