- Add secrets section at end of docker-compose.staging.yml
- Ensures secrets are properly loaded even if inherited from base file
- Should fix issue where REDIS_PASSWORD_FILE variable is not set
- Secrets are now explicitly defined: redis_password, db_user_password, app_key, vault_encryption_key, git_token
- Add REDIS_PASSWORD_FILE=/run/secrets/redis_password to staging-app environment
- Add redis_password to staging-app secrets list
- Ensures REDIS_PASSWORD can be resolved from Docker Secret via *_FILE pattern
- Fixes issue where REDIS_PASSWORD was empty in staging-app even though secret exists
