Refactor output generation in write_client_footprint to use safe_get for improved error handling and clarity

Refactor header key format in multiple analyst classes to use 'x_api_key' instead of 'x-api-key'

Refactor payload handling in SeoOffPageAnalyst; update debug information to use combined_text instead of payload_txt

Integrate Client Summary into multiple response classes

Refactor: Clean up code structure and improve payload handling in SEO and Social Media analysis

Add SEO analysis modules and refactor existing code