Restore simple hash enum

Dockerfile-builder

@@ -7,7 +7,7 @@ FROM python:${VERSION}-bookworm
 #      .github/workflows/python-package.yml
 #      .github/workflows/python-publish.yml
 #
-ENV DEBIAN_FRONTEND noninteractive
+ENV DEBIAN_FRONTEND=noninteractive
 
 RUN curl -fsSOL https://taskfile.dev/install.sh \
   && sh install.sh \

archivist/proof_mechanism.py

@@ -17,6 +17,6 @@ class ProofMechanism(Enum):
 
     # previously used but now removed
     __RESERVED1 = 1
-    __RESERVED2 = 2
+    SIMPLE_HASH = 2
     #: Assets and events are proven using a merkle log hash of the originator's evidence
     MERKLE_LOG = 3

unittests/testproof_mechanism.py

@@ -38,14 +38,14 @@ def test_proof_mechanism_reserved1(self):
                 ProofMechanism.__RESERVED1.name, "__RESERVED1", msg="Incorrect value"
             )
 
-    def test_proof_mechanism_reserved2(self):
+    def test_proof_mechanism_simple_hash(self):
         """
         Test proof_mechanism
         """
-        with self.assertRaises(AttributeError):
-            self.assertEqual(ProofMechanism.__RESERVED2.value, 2, msg="Incorrect value")
+        self.assertEqual(ProofMechanism.SIMPLE_HASH.value, 2, msg="Incorrect value")
 
-        with self.assertRaises(AttributeError):
-            self.assertEqual(
-                ProofMechanism.__RESERVED2.name, "__RESERVED2", msg="Incorrect value"
-            )
+        self.assertEqual(
+            ProofMechanism.SIMPLE_HASH.name,
+            "SIMPLE_HASH",
+            msg="Incorrect value",
+        )