sys-ctl-rpr-docker-soft: switch to STRICT label mode and adapt tests

- script.py now resolves docker-compose project and working_dir strictly from container labels
- removed container-name fallback logic
- adjusted sys-ctl-hlth-docker-container to include sys-ctl-rpr-docker-soft
- cleaned up sys-svc-docker dependencies
- updated unit tests to mock docker inspect and os.path.isfile for STRICT mode

Conversation: https://chatgpt.com/share/68b80927-b800-800f-a909-0fe8d110fd0e

roles/sys-svc-docker/tasks/01_core.yml

@@ -21,6 +21,5 @@
     - sys-ctl-bkp-docker-2-loc
     - sys-ctl-hlth-docker-container
     - sys-ctl-hlth-docker-volumes
-    - sys-ctl-rpr-docker-soft
     - sys-ctl-rpr-docker-hard
   when: SYS_SVC_DOCKER_LOAD_SERVICES | bool