Treating a blank load() as unindexable defeated the feature it was
meant to protect: four of the eleven historical dockets hold 1-2
comments with no text at all, so none of them could ever be marked
complete and ~130k items would be re-listed on every run.
An item with no text is a finished state, not a failure. Stamp it into
index_state with content_hash='' / chunk_count=0 and its fingerprint —
the empty hash cannot collide with a real sha256 — so the next run
fingerprint-skips it without a load, and it no longer blocks its
docket's completion. Text appearing later changes the fingerprint and
the item is embedded normally.
Only a ref that loaded *with* text and chunked to nothing stays
unindexable and blocks index_docket_state; the embed/write path already
aborts the whole run on error. The index_state upsert both callers need
is now _record_state().
ed55a8f883