Child of #695 (plan Phase 4 + 5). After gate G3: commit to the provider, recompute the section 6 cost table with the measured stream_capacity S and real Sunshine bitrate first, record the decision on #695. Provision the first production body, enroll as a pet in nodes.yaml, district cloud--1.
Peer the necks of qualified venues directly with the cloud district, keep hub routing as fallback, verify MTU end to end (clamp tunnel MTU, Moonlight 1392 must fit, no fragmentation). Before each venue cutover run one fresh tunnel-direct B2 and require a pass.
Slot count = the pilot hydramark number, capped at 1 until #511 lands. Serve the best matrix-cell venue first; per-venue go-live gate: one real full-head mercator-talks session passes the #402-style gate on the live path with the in-session probe reporting to HydraNeck. Then extend.
Steady state: flat monthly seats sized to measured peak concurrency, day/week seats for event peaks (enrol/retire under 30 minutes operator time each way), quarterly re-qualification sweep against winner and warm alternative. Close the loop on #695 and children per the investigate-and-close rule.