Update CI workflow to exclude example vault files from validation and add host variables for dev02

- Modify CI workflow to filter out example vault files during encryption validation
- Add new host variables for dev02, including sudo configuration and shell user settings
- Disable installation of data science stack components for dev02

.gitea/workflows/ci.yml

@@ -164,7 +164,7 @@ jobs:
       - name: Validate vault files are encrypted
         run: |
           echo "Checking for Ansible Vault files..."
-          vault_files=$(find . -name "*vault*.yml" -o -name "*vault*.yaml" | grep -v ".git" || true)
+          vault_files=$(find . -name "*vault*.yml" -o -name "*vault*.yaml" | grep -v ".git" | grep -v ".example" || true)
           if [ -z "$vault_files" ]; then
             echo "No vault files found"
             exit 0