refactor: drop make deploy and its refs/deploy stamps, the fleet deploys from infra/komodo; short readme and claude.md

template/{{ part_dir }}/{% if layout == 'part' %}CLAUDE.md{% endif %}.jinja

@@ -0,0 +1,10 @@
+## Checking commands
+After writing code, always run from `backend/`:
+```shell
+make fmt
+make check
+```
+{% if backend_services or dynamic_config %}
+{% endif %}{% if backend_services %}Mind startup imports: `make check` runs `scripts/check_imports.py`.
+{% endif %}{% if dynamic_config %}Change dynamic config only through its update methods.
+{% endif %}