chore(docker): update .dockerignore with AI tooling files (#554)

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: nanotaboada

.dockerignore

@@ -6,18 +6,23 @@
 .vscode/
 htmlcov/
 postman-collections/
+.claude/
+CLAUDE.md
 .codacy.yml
+.coderabbit.yaml
 .coverage
 .coveragerc
 .flake8
 .gitignore
 .pylintrc
+CHANGELOG.md
 CODE_OF_CONDUCT.md
 codecov.yml
 commitlint.config.mjs
 CONTRIBUTING.md
 coverage.xml
 LICENSE
+.sonarcloud.properties
 /tests/
 __pycache__/
 *.pyc