Sessions.swift is a separate file from ForgeClient.swift but in the same
module — fileprivate blocked the cross-file call. internal (default) is
the correct visibility: same-module accessible, not part of public API.
Also dropped the unused @preconcurrency on Sessions.swift's Foundation
imports — that file doesn't reference Sendable-warning-emitting types
directly (URLSession etc), so the attribute was a no-op generating
remarks. Kept @preconcurrency on ForgeClient.swift where it actually
suppresses URL/URLSession/JSONEncoder/JSONDecoder Sendable warnings.
Caught by crafting-table queue (job 77012573) — first real dogfood of
the build farm. exit_1, log surfaced the inaccessibility error in 6s.
Kayos
fabc782c09