A pending target equal to the applied offset uploaded the same record, so
_run_moving saw no advance and never committed it: pending stayed latched,
blocking run(n > 1) and direct steps. Commit whenever a target was pending
(no_donor check and hold-record re-upload still only on advancing steps).
moving_diagnostics() without moving circles now returns (0, DIAG_FLOATS)
instead of the stale (0, 6). Tests for both.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>