Add deployment configuration for ElevenLabs integration

[martinbedouret]

Set up proper environment configuration, build processes, and deployment considerations for ElevenLabs feature rollout.

Acceptance Criteria

• Add environment variables for ElevenLabs configuration and feature flags
• Update build and deployment scripts to handle new dependencies
• Configure staging and production environments with proper API endpoints
• Add monitoring and logging for ElevenLabs API usage and errors
• Implement feature flags for gradual ElevenLabs rollout
• Update security configurations for API key handling and storage
• Add environment-specific validation and configuration checks

Technical Implementation Notes

// Add to .env files
REACT_APP_ELEVENLABS_ENABLED=true
REACT_APP_ELEVENLABS_API_BASE_URL=https://api.elevenlabs.io/v1
REACT_APP_ELEVENLABS_TIMEOUT=10000

// Feature flag implementation
export const ELEVENLABS_ENABLED =
  process.env.REACT_APP_ELEVENLABS_ENABLED === 'true';

Files to Modify

• Environment configuration files (.env.*)
• src/constants.js
• CI/CD pipeline configurations
• Deployment scripts