chore: normalize quote style in playbooks (#9)

## Summary
- Standardize single quotes to double quotes across deploy, destroy, provision, and restore playbooks

## Test plan
- No functional changes — formatting only

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Reviewed-on: #9
Co-authored-by: M.V. Hutz <git@maximhutz.me>
Co-committed-by: M.V. Hutz <git@maximhutz.me>

playbooks/deploy.yml

@@ -171,7 +171,7 @@
       ansible.builtin.file:
         path: /root/data
         state: directory
-        mode: '0777'
+        mode: "0777"
 
     - name: Run image.
       community.docker.docker_container: