examples: skip the code-review tests when their optional deps are absent

The example ships its own dependencies, which the SDK test job does not
install, so importing the test module failed collection in the main CI.
Guard the module with importorskip on unidiff so it skips cleanly when
the example dependencies are not present and runs in full when they are.

Updates #92

RELEASE NOTES: NONE

Author: Acture

tests/examples/test_skills_code_review_agent.py

@@ -19,6 +19,11 @@
 if str(_EXAMPLE_DIR) not in sys.path:
     sys.path.insert(0, str(_EXAMPLE_DIR))
 
+# This example ships its own dependencies (examples/skills_code_review_agent/requirements.txt) that the
+# SDK's test job does not install. Skip the whole module cleanly when they are absent rather than failing
+# collection in the main CI.
+pytest.importorskip("unidiff", reason="run: pip install -r examples/skills_code_review_agent/requirements.txt")
+
 from pipeline import report as report_mod  # noqa: E402
 from pipeline.dedup import dedup_and_denoise  # noqa: E402
 from pipeline.engine import run_review  # noqa: E402