Outcome of FileStorageEngineBase.ResolveDefaultAccount: which account the system-wide fallback chose, and whether the choice was ambiguous (so callers can warn in their own terms).
true when two or more candidates existed, so the choice fell to the tie-breaker.
true
Every candidate considered, ordered newest __mj_UpdatedAt first (ties by ID).
__mj_UpdatedAt
The chosen account, or null when there were no candidates.
null
Outcome of FileStorageEngineBase.ResolveDefaultAccount: which account the system-wide fallback chose, and whether the choice was ambiguous (so callers can warn in their own terms).