Add API Key Authorization to Webhooks

[asdev29]

Description

Currently, the application allows registering webhooks and sends a POST request to the specified URL when triggered. However, there is no functionality to include any form of authorization with these requests. This limits the ability to securely interact with webhooks that require an API key or other authentication mechanisms.

Proposed Enhancement

Add functionality to optionally include an API key or other authorization methods (e.g., headers) when sending webhook POST requests. This will allow integration with endpoints that require secure access.

Acceptance Criteria

• Users can configure an API key (or authorization token) when registering a webhook.
• The API key is sent as part of the POST request headers (e.g., Authorization: Bearer ).
• The functionality is optional, and the webhook should still work without an API key if not configured.
• Proper validation and secure storage of the API key during webhook registration.