* fix(memory): filter honcho search by category instead of stamping it on unfiltered results
HonchoMemoryManager.search sent an identical unfiltered query whether or
not a category was requested, then stamped the requested category on
every hit, so memory_search(category=...) returned unfiltered results
attested to be that category (e.g. a work fact labeled "preference")
— the opposite of the contract, where category filters before the
top_k slice and only facts with that exact category are returned.
Send the category as a real server-side metadata filter (Honcho applies
"metadata" filters in its ranked query, before the limit) and label
each result from the record's own metadata, falling back to "memory"
as before. HonchoClient.search gains a keyword-only filters argument
that is only put on the wire when set, so unscoped requests are
byte-identical to before.
* docs(memory): note honcho category filtering requires stored metadata
816ebd5563