fix: test ref for v0.2.0

Co-Authored-By: Oz <oz-agent@warp.dev>

Author: tbitcs

tests/sandbox/test_sandbox_import.py

@@ -182,7 +182,7 @@ def test_full_import_workflow(self, tmp_path: Path) -> None:
         assert (root / "LEDGER.md").exists()
         assert (root / "docs" / "REQUIREMENTS.md").exists()
         assert (root / "docs" / "TEST_SPEC.md").exists()
-        assert (root / "docs" / "architecture.md").exists()
+        assert (root / "docs" / "ARCHITECTURE.md").exists()
 
         # ---- Step 4: Verify overlay content ----
         agents = (root / "AGENTS.md").read_text(encoding="utf-8")