fix(newos4): world_model_query default path parses again (v4.6.83-84)

_modelDigest() returned JSON.stringify(...) cut at 4000 chars plus '…(digest truncated)'. The
tool then did JSON.parse() on it, so the default detail threw 'Unexpected end of JSON input'
every single call; detail:'full' worked only because it returned the object untouched.

The digest now returns an OBJECT (_modelSnapshot) and shrinks by reducing list lengths, then by
dropping whole sections with an explicit 'omitted' list. The string form is generated at the
edge and is always valid JSON.

Verified: default call -> no error, 13-key snapshot, facts answered; caps 400/1200/4000 all under
cap and parseable; the residual floor at cap 200 is identity fields only.

0 files changed, 0 insertions, 0 deletions