feat: enhance email service with new configuration options and batch email sending

feat: add LANGGRAPH API keys to environment variables for deployment

Refactor code structure for improved readability and maintainability

feat: add TENANT_ID environment variables for different deployment stages

Merge branch 'development' into refactor/a2i-image-generation

refactor: add GEMINI_API_KEY to configuration and update credits estimation service to use it

feat: add Pexels API key configuration and update topics model with UUIDs

feat: add beta branch handling in CI/CD workflow

feat: add beta branch to CI/CD workflow triggers

feat: add beta environment configuration and update CI/CD workflow for beta deployment

fix: correct SMTP_PORT environment variable assignment in CI/CD workflow

feat: add SMTP configuration to support email functionality

KKP-291 | refactor : replace synchronous gallery image-analysis with cloud-run job-trigger

feat: repo init