Add Makefile install and test targets for local development.

README.md

@@ -30,7 +30,14 @@ Adjacent repositories own nearby but separate concerns:
 ## Quick Start
 
 ```bash
-python3 -m pytest
+make test
+```
+
+Install for local development or ops-warden integration:
+
+```bash
+make install-editable
+# or from ops-warden: make install-all
 ```
 
 The default test suite uses only deterministic local fixtures.