Fix Api Common [Server Side]

- [+] fix(common.ts): improve handling of OpenAI-Organization header
 - Check if serverConfig.openaiOrgId is defined and not an empty string
 - Log the value of openaiOrganizationHeader if present, otherwise log that the header is not present
 - Conditionally delete the OpenAI-Organization header from the response if [Org ID] is undefined or empty (not setup in ENV)