Cut version 0.2.21 (current = v_0_2_21) with the adjudicated DO-item fixes. Also commits the previously-untracked v_0_2_* version files that versions/index.ts imports (ROADMAP item D2), so a fresh checkout builds without dangling imports. The missing v_0_2_2 is intentional (versions are an unordered set). Built and verified: ten31portal_x86_64.s9pk packs cleanly at 0.2.21:0, arch x86_64, SDK 0.4.0.
StartOS packaging
StartOS 0.4.0 service packaging goes here (Issue 17).