Add .gitignore for production repo

.gitignore

@@ -0,0 +1,20 @@
+# Test files
+test_*.py
+
+# Development versions
+*_enhanced.py
+*_newer*.py
+*_test.py
+
+# Backups
+*.bak
+*.backup*
+*.old
+
+# Environment
+.env
+venv/
+__pycache__/
+
+# Configs with secrets
+config.yaml