Native runtime c3a1dd480534 (orchestrator V2)

Native runtime built from t3code fork commit c3a1dd480534347b5bfddfebd33aafd016d5b78b on upstream nightly v0.1.1-nightly.20261018.3315 (9c161462c94f7d9d6d9169da5c841457cbadf213, on upstream main), on top of native-runtime-42ef3397fa38. New since 42ef3397fa38, for OpenCode 2.1 and later (the sandbox moves to OpenCode 2.2.5): the message history of a compacted session decodes again (upstream t3code #22661, cherry-picked), and the compaction started and ended events, which OpenCode 2.1 sends without recent, reach the thread instead of being skipped. Checked against a real OpenCode 2.2.5 server: every OpenCode call the runtime makes, and text, approval, question, file write, subagent, image read and compaction turns through the runtime's OpenCode adapter.