escape-fel's daq_cache_writer subprocess was finding scan_info_rel.json
via its default raw/-first search order and failing every poll with
OSError: [Errno 30] Read-only file system, since raw/ is read-only for
this account (found via a real live_parse_cache test on
saresb-vcons-03, run 80). Now always pass --metadata-file pointing at
the writable res/run_data/daq/run<NNNN>/aux/scan_info_rel.json copy
(same convention _write_status_locally already uses), and
--broker-address-aux so the child uploads its cache file into the
run's raw/aux/ afterward -- the same copy_user_files call append_aux
makes for every other DAQ-client-written aux file.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
lemke_handClaude Sonnet 5
7d6dcc7157