Spec 13 requires that a secret session's query is sent unless the query
itself holds a known-prefix secret. serve.rs already ignores MemoryCall
taint on both read tools; the serve tests always sent Private. A skip of
Honcho for Secret would not have failed. Each suite now has one call at
class secret that asserts the fake received the search or chat.
Co-Authored-By: Grok 4.6 <noreply@x.ai>
kyleandGrok 4.6
