Align ignores and clarify APT version selection

.gitignore

@@ -1,8 +1,60 @@
+# Python
 __pycache__/
 *.py[cod]
+*.pyo
 *.egg-info/
+.eggs/
 .pytest_cache/
-.venv/
+.mypy_cache/
+.ruff_cache/
+.hypothesis/
+.tox/
+.nox/
+.pyre/
+.pytype/
+.pyright/
+
+# Packaging
 build/
 dist/
+*.whl
+*.deb
+*.rpm
+rpmbuild/
+
+# Virtual environments
+.venv/
+venv/
+env/
+.direnv/
+
+# Coverage
+.coverage
+.coverage.*
+coverage.xml
+htmlcov/
+
+# Editors and operating systems
+.idea/
+.vscode/
+.fleet/
+*.swp
+*.swo
+*~
+.DS_Store
+Thumbs.db
+
+# Local configuration and secrets
 .env
+.env.*
+!.env.example
+synadm.yaml
+synadm.yml
+synadm.yaml.bak-*
+synadm.yml.bak-*
+*.local.yaml
+*.local.yml
+
+# Local logs and temporary files
+*.log
+*.tmp