Explain why we think a release has not been fully installed

Change from

           INFO     Showing status of release dev-23a in                                   mpsd_software.py:1029
                    /Users/fangohr/git/mpsd-software-manager/build
           DEBUG    Looking for files in                                                   mpsd_software.py:1045
                    /Users/fangohr/git/mpsd-software-manager/build/dev-23a/m2/spack
           ERROR    MPSD release 'dev-23a' has not been completely installed.              mpsd_software.py:1046`

to

[07:35:02] INFO     Showing status of release dev-23a in                                   mpsd_software.py:1029
                    /Users/fangohr/git/mpsd-software-manager/build
           INFO     Could not find directory                                               mpsd_software.py:1045
                    /Users/fangohr/git/mpsd-software-manager/build/dev-23a/m2/spack.
           ERROR    MPSD release 'dev-23a' has not been completely installed.

src/mpsd_software_manager/mpsd_software.py

@@ -1042,7 +1042,7 @@ def environment_status(mpsd_release: str, root_dir: Union[str, Path]) -> dict:
     # if the mpds_release directory exists but the spack repository is not fully
     # cloned - indicates some kind of incomplete installation:
     if not spack_dir.exists():
-        logging.debug(f"Looking for files in {spack_dir}")
+        logging.info(f"Could not find directory {spack_dir}.")
         logging.error(
             f"MPSD release '{mpsd_release}' has not been completely installed."
         )