fix: recover workspace publication failures

backend/test/routes-workspaces.test.ts

@@ -194,6 +194,8 @@ test("returns a 409 field conflict instead of overwriting a changed workspace",
     new WorkspaceRegistryError("workspace_conflict", "Workspace has changed"),
     {
       fields: ["semantic_index.embedding.model"],
+      expected: { commit: "c".repeat(40), blob: "d".repeat(40) },
+      actual: { commit: revision.commit, blob: revision.blob },
       base: workspace,
       local: { ...workspace, semantic_index: { ...workspace.semantic_index, embedding: { ...workspace.semantic_index.embedding, model: "local/model" } } },
       remote: { ...workspace, semantic_index: { ...workspace.semantic_index, embedding: { ...workspace.semantic_index.embedding, model: "remote/model" } } },
@@ -214,6 +216,8 @@ test("returns a 409 field conflict instead of overwriting a changed workspace",
   expect(res.json()).toMatchObject({
     code: "workspace_conflict",
     fields: ["semantic_index.embedding.model"],
+    expected: { commit: "c".repeat(40), blob: "d".repeat(40) },
+    actual: { commit: revision.commit, blob: revision.blob },
     base: workspace,
     remote: expect.objectContaining({
       semantic_index: expect.objectContaining({