backend overhaul

.gitignore

@@ -1,5 +1,20 @@
+# secrets
 .env
-/__pycache__/*
-/.venv/*
-/data/*
-test/*
+
+# Python cache — matches any depth, no need to list per-directory
+__pycache__/
+*.pyc
+*.pyo
+*.pyd
+
+# test artifacts
+.pytest_cache/
+.coverage
+htmlcov/
+
+# virtualenv
+.venv/
+
+# data + exports
+data/
+*.csv