fix(audit): fermer les frontieres restantes

tests/test_filesystem_roots.py

@@ -9,9 +9,8 @@ in the project directory.
 
 The document store was fixed in wave G. The other two were not, and the gap
 that opened between them is the reason this file exists: `backup.py` kept
-archiving `./documents` while the application wrote to `DOCUMENTS_ROOT`, and
-the script's answer to a missing directory is to print a line and exit 0.
-Following the deployment documentation was what broke it.
+archiving `./documents` while the application wrote to `DOCUMENTS_ROOT`.
+The script now resolves the shared root and fails the run when it is absent.
 """
 
 import os
@@ -106,16 +105,15 @@ class TestTheBackupScriptAgreesWithTheApplication:
         with zipfile.ZipFile(archive) as zf:
             assert any(name.endswith('contrat.pdf') for name in zf.namelist())
 
-    def test_a_missing_store_names_the_path_it_looked_in(self, tmp_path, monkeypatch, capsys):
-        """ "No documents directory found" read as "there are no documents"
-        rather than "I am looking in the wrong place"."""
+    def test_a_missing_store_names_the_path_it_looked_in(self, tmp_path, monkeypatch):
+        """A missing configured store is an actionable failure, not a skip."""
         from app.supporting_scripts import backup
 
         missing = tmp_path / 'not-here'
         monkeypatch.setenv('DOCUMENTS_ROOT', str(missing))
 
-        assert backup.backup_documents() is None
-        assert str(missing) in capsys.readouterr().out
+        with pytest.raises(backup.BackupError, match=str(missing).replace('\\', '\\\\')):
+            backup.backup_documents()
 
 
 class TestLogsFollowTheSameRule: