Fix Vercel CLI authentication method for v46.1.1 compatibility

- Replace deprecated 'vercel login --token' with environment variable authentication
- Use VERCEL_TOKEN as env var and verify with 'vercel whoami'
- Maintain compatibility with existing VERCEL_ORG_ID and VERCEL_PROJECT_ID

Author: Neil Munoz

.github/workflows/production-pipeline.yml

@@ -354,8 +354,12 @@ jobs:
             exit 1
           fi
 
-          # Login with token
-          if ! vercel login --token "$VERCEL_TOKEN"; then
+          # Set Vercel token as environment variable (new authentication method)
+          export VERCEL_TOKEN="$VERCEL_TOKEN"
+          echo "✅ Vercel token configured via environment variable"
+
+          # Verify authentication
+          if ! vercel whoami; then
             echo "❌ Vercel authentication failed"
             exit 1
           fi