Get a specific comment on one entity (program, task, or request)

Retrieves a single comment with complete details including content, author information, timestamps, and metadata.
This endpoint is useful for direct comment access, deep linking, and detailed comment display in user interfaces.

Key Features:

• Retrieves complete comment details with all metadata
• Includes author information and creation/modification timestamps
• Validates user access permissions before returning comment data
• Returns structured comment object suitable for UI display
• Supports direct comment linking and reference resolution

Authorization Logic:

1. User must have a valid JWT token with viewing or management scopes
2. Token is valid for this operation
3. User must have access to the comment and its parent entity
4. User must have access to the space containing the entity

Usage Example:

Retrieve specific comment details for display in notification systems or direct comment references.