fix: Initialize rbenv in GitHub Actions deployment script

Fixes 'bundle: command not found' error by initializing rbenv
environment before running bundle commands in SSH session.

Author: rz1989s

.github/workflows/deploy.yml

@@ -43,6 +43,10 @@ jobs:
 
             cd ~/apps/core
 
+            # Initialize rbenv
+            export PATH="$HOME/.rbenv/bin:$PATH"
+            eval "$(rbenv init - bash)"
+
             # Pull latest changes
             echo "📥 Pulling latest code from main..."
             git fetch origin