feat: sync missing features from v0.49.x line to master

The v0.49.x tag line diverged from origin/master, leaving many
features only accessible via tags but not on the master branch.

New modules:
- ci/cancel_superseded_runs.py — cancel superseded CI runs
- ci/check_workflow_artifact_deps.py — validate artifact deps
- ci/check_workflow_tofu_init.py — validate tofu init steps
- tools/check_alert_rules.py — validate Prometheus alert rules
- tools/check_ansible_set_fact_to_json.py — lint set_fact usage
- tools/check_docker_init.py — validate Docker init scripts
- utils/jinja.py — Jinja2 template utilities
- utils/ui.py — UI/console utilities

Modified modules:
- distribute_molecule.py: add --include-roles/--exclude-roles
- utils/api.py: add container.credentials for private registry auth
- install_tools.py: retry ansible-galaxy on transient timeouts
- setup_image.py: skip dep resolution with --no-deps
- cli.py: register new commands
- i18n.py: add new translation keys

Also removes accidentally committed .vale/styles/Google/ files.

Test results: 2195 passed, 100% coverage.

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

docs/tech/ci-cd-workflow.md

@@ -478,6 +478,15 @@ python -m devx.molecule.distribute_molecule --list
 python -m devx.molecule.distribute_molecule --list-platforms
 ```
 
+### `molecule_ci_guard.py`
+
+Runs molecule tests sequentially while polling the Gitea API for other runner
+failures. Aborts early if another runner fails the same job.
+
+```bash
+python -m devx.molecule.molecule_ci_guard [--roles-root <dir>] pair1 pair2 ...
+```
+
 ### `validate_commit_msg.py`
 
 Validates commit messages. On feature branches: conventional commits only