feat: prepare ARR for controlled public deployment

.gitignore

@@ -0,0 +1,44 @@
+.DS_Store
+__pycache__/
+*.py[cod]
+.pytest_cache/
+.mypy_cache/
+.ruff_cache/
+.coverage
+htmlcov/
+build/
+dist/
+*.egg-info/
+
+.venv/
+.venv-mcp/
+.venv*/
+
+.env
+.env.*
+*.env
+!*.env.example
+!**/*.env.example
+!/deploy/.env.production.example
+
+*.log
+*.sqlite3
+*.sqlite3-*
+
+/outputs/
+/runtime/
+/private-fixtures/
+/.planning/
+/.work/
+/.tmp/
+/.validation/
+/task_plan.md
+/findings.md
+/progress.md
+
+node_modules/
+**/node_modules/
+
+/*.xml
+/*.XML
+/*.xlsx