Introduce flake8-bandit (S113)

Based on !2281 (merged)

Introduces:

• https://docs.astral.sh/ruff/rules/request-without-timeout/

arkindex/documents/tests/test_indexer.py

 import json
-from hashlib import md5
+from hashlib import sha256
 from unittest.mock import patch
 from uuid import UUID
 
@@ -103,7 +103,7 @@ class TestIndexerCommand(FixtureTestCase):
         self.assertEqual(indexer.hash_worker(self.worker_version), self.worker.name)
 
     def test_build_id(self):
-        expected = UUID(md5(self.page.id.bytes + self.page.id.bytes).hexdigest())
+        expected = UUID(sha256(self.page.id.bytes + self.page.id.bytes).hexdigest())
         indexer = Indexer(None)
         self.assertEqual(indexer.build_solr_id(self.page, self.page), expected)