feat: pin sessions to workspace revisions

harness/tests/test_session_documents.py

@@ -7,7 +7,7 @@ from typer.testing import CliRunner
 from tht.config import DatabaseConfig
 from tht.decisions import DecisionRecord
 from tht.session.models import SessionSnapshot
-from tht.session.store import build_documents, build_snapshot_documents, create_session
+from tht.session.store import build_documents, build_snapshot_documents, create_session, new_session_manifest
 from tht.cli.session_cmd import session_app
 
 
@@ -18,6 +18,15 @@ def _db():
     )
 
 
+def test_manifest_persists_workspace_revision():
+    manifest = new_session_manifest(
+        "q", _db(), workspace_id="psd-clinical", workspace_revision="a" * 40
+    )
+
+    assert manifest.workspace_id == "psd-clinical"
+    assert manifest.workspace_revision == "a" * 40
+
+
 def test_build_documents_always_has_original_question(tmp_path):
     m = create_session("quante ablazioni nel 2024", _db(), tmp_path)
     docs = build_documents(m, tmp_path / m.id)