Fix: Add missing dependencies and improve Docker setup

[cex-trader]

Description

This MR fixes critical Docker deployment issues and improves the containerized setup:

1. Missing Dependency: Adds google-auth-oauthlib package which is required by horilla_backup module but was missing from requirements.txt, causing ModuleNotFoundError during application startup.

2. Translation Compilation: Installs gettext tools in Dockerfile and adds automatic translation file compilation in entrypoint.sh, fixing the language selection feature that wasn't working due to missing compiled .mo files.

3. Startup Reliability: Improves entrypoint.sh with database connection wait logic and better error handling to ensure migrations and static file collection complete successfully before starting the server.

Dependencies Required:

• google-auth-oauthlib (new dependency)
• gettext system package (for translation compilation)

Ticket Link

N/A

Summary of Changes

• Add google-auth-oauthlib to requirements.txt
• Install gettext package in Dockerfile runtime stage
• Add database connection wait logic in entrypoint.sh
• Add automatic translation file compilation (compilemessages) in entrypoint.sh
• Add --noinput flags to migration commands for non-interactive execution
• Improve error handling for admin user creation (skip if already exists)

Additional implementation details (OPTIONAL)

• Database wait loop uses psycopg2 connection test to ensure database is ready before migrations
• Translation compilation uses || echo fallback to prevent startup failure if some translations fail
• All migration and collection commands use --noinput flag for Docker compatibility
• Added set -e at the beginning of entrypoint.sh for better error handling

Deployment Notes (OPTIONAL)

• No breaking changes - this is a bug fix and improvement
• Existing Docker deployments will need to rebuild images to get the fixes
• Translation files will be automatically compiled on container startup
• First-time deployments will benefit from improved database wait logic
• The gettext package adds ~10MB to the Docker image size

Screenshot

Before

Error during startup:

ModuleNotFoundError: No module named 'google_auth_oauthlib'

Language selection not working:

• Translation files existed but were not compiled (missing .mo files)
• Language switcher in UI had no effect

Potential race conditions:

• Server might start before database is fully ready
• Migrations could fail silently

After

Successful startup:

• All dependencies installed correctly
• Translation files compiled automatically
• Language selection works properly

Improved reliability:

• Database connection verified before migrations
• Better error handling throughout startup process
• Non-interactive execution suitable for Docker environments