backport improvements from hulpvraag

- tasks: fetch tags before bump, auto-push tag, add version() task
- tasks(service): pre=[ci] on build_image, :latest tag, interactive deploy prompt
- pyproject.toml: add ruff isort known-first-party section
- Dockerfile: add smoke-test import after install

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

{{cookiecutter.project_slug}}/pyproject.toml

@@ -65,3 +65,6 @@ ignore = [
 
 [tool.ruff.lint.per-file-ignores]
 "tests/*" = ["ARG001"]  # Allow unused arguments in tests
+
+[tool.ruff.lint.isort]
+known-first-party = ["{{ cookiecutter.package_name }}"]