n8n: throw on FAILED memory events (was silently returned), poll on any
non-terminal status (PENDING or RUNNING), use top_k (not limit) for
search, coerce search/getAll responses to arrays, guard invalid-JSON
metadata, reject empty updates, mark user_id required; lint clean.
Zapier: coerce boolean fields (String(x) !== 'false') + boolean defaults
so "Wait"/"Infer = No" are honored, throw on HTTP >= 400 (was silent
empty/fake-success), throw on FAILED events, use top_k, numeric coercion
with clamping, mark user_id required.