Fix CI/CD: export APP_VERSION before docker-compose build

Ensures APP_VERSION is available as an environment variable
when docker-compose starts, so containers pick up the correct version.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.github/workflows/ci-cd.yml

@@ -183,6 +183,7 @@ jobs:
           
           # Build and start containers from source code
           echo "🔨 Building and starting containers from source code..."
+          export APP_VERSION=$(cat VERSION 2>/dev/null || echo "unknown")
           docker-compose -f compose.yml up -d --build
           
           # Wait for containers to be ready