count_template_data() uses fetch_analytics with a COUNT(*) query.
The pseo_env test fixture's mock returned TEST_ROWS for any unrecognized
query, causing a KeyError on rows[0]["cnt"]. Add a COUNT(*) branch that
returns [{cnt: len(TEST_ROWS)}].
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>