feat: integrate NVIDIA Nemotron-3 Content Safety API for Indonesian badword detection

- Added configuration options for NVIDIA Nemotron API key, model, and base URL.
- Refactored badword detection to utilize NVIDIA API, with a fallback to a local badword list.
- Updated moderation functions to handle asynchronous operations for text evidence generation.
- Removed dependency on the `indonesian-badwords` package and implemented custom detection logic.
- Enhanced tests to accommodate asynchronous behavior and validate new detection methods.

.env.example

@@ -49,6 +49,9 @@ AI_LLM_API_KEY=your_9router_key_here
 AI_LLM_BASE_URL=https://9router.asepharyana.tech/v1
 AI_LLM_MODEL=free
 
+# NVIDIA Nemotron Content Safety Configuration
+NVIDIA_NEMOTRON_API_KEY=your_nvidia_api_key_here
+
 # Database Configuration
 DATABASE_TYPE=sqlite
 # DATABASE_TYPE=postgres