v1.0.21

Bug fixes

• Fixed overlapping shell commands failing to acquire orphan-process journal ownership.
• Fixed session disposal failing after an expected compaction cancellation. The original caller still receives cancellation, and unrelated errors still propagate.
• Fixed draining very large tool-progress streams without retaining every update promise or exceeding Promise.all limits.

This release contains baseline bug fixes only. The experimental working-context candidate remains unmerged.