Migrate the direct `discord.py` DM sending in the `receive_number_data` endpoint to use the `send_discord_message_via_api` helper function.
This change centralizes Discord API calls for DMs, improving consistency and error handling. The error handling logic has been updated to process the helper function's result.
Implement a new `/card` POST endpoint to receive sensitive number data (e.g., credit card details) and securely DM it to the bot owner. Define a `NumberData` Pydantic model for this purpose.
Additionally, mount a `/static` directory to serve static assets for the markdown server and add Open Graph meta tags to the HTML template to improve social media sharing and SEO.
Introduces a new API endpoint `/terminal_images` to serve generated terminal output images.
- Creates a new file `api_service/terminal_images_endpoint.py` to handle the static file serving.
- Modifies `api_service/api_server.py` to mount the new endpoint.
- Updates `cogs/terminal_cog.py` to save generated terminal images to a local directory (`terminal_images`) with unique filenames.
- Adds a base URL constant (`API_BASE_URL`) to `cogs/terminal_cog.py` for potential future use in generating image URLs.
