test_upload_ok still asserted the old '<name>?v=<mtime>' url — uploads take a
free name now, so the name itself is the cache key and the query is gone.
MAX_CONFIG_BYTES was 12 MB, above the WebSocket frame limit: a payload that big
never reaches the handler, the socket just closes with 1009 and the user sees a
dropped connection instead of an actionable error. 4 MB is far above any real
configuration and comfortably inside the frame.
test_upload_never_overwrites listed the whole shared test config folder.
- upload/plan_set tests asserted the old public /houseplan_files/... paths
and only run in CI, so the B1 change surfaced there
- +test for the fail-closed admin check (audit B2/T4: the authorization
boundary had zero coverage)