Initial commit: project plan and gitignore

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,43 @@
+# Python
+__pycache__/
+*.py[cod]
+*.egg-info/
+dist/
+build/
+.venv/
+venv/
+*.egg
+
+# Node
+node_modules/
+frontend/dist/
+
+# Environment
+.env
+.env.local
+.env.production
+
+# IDE
+.idea/
+.vscode/
+*.swp
+*.swo
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Docker volumes (local data)
+data/
+
+# Generated files
+*.log
+
+# Test / coverage
+.coverage
+htmlcov/
+.pytest_cache/
+coverage/
+
+# Alembic
+backend/alembic/versions/__pycache__/