SQL SELECT * omits @computed scalars (subtotal=undefined) while an explicit column list surfaces them corr #2333

From dispatch finding (task qa-wave-2026072920):

• F-257 — SQL SELECT * omits @computed scalars (subtotal=undefined) while an explicit column list surfaces them correctly (subtotal=10), and REST's default no-select GET plus GraphQL both work — so the wildcard path was missed by REST GET silently omits @computed fields from responses (computed getters are non-enumerable) #1484/fix(serialization): surface @computed scalars on default reads + guard cyclic @enumerable serialization (#1484) #1601 (c899a82a2), whose stated scope was "default reads across REST/GraphQL/SQL". Two days post-merge is the cheapest moment to close it. Distinct code path from F-190, which drops dynamic attributes on schema-less tables; these two only share a symptom surface.
  Related to Operations API returns null for @relationship attributes (or rejects them): the thread serving it never loads the component schema #2296