plan: unified-runtime seed run — Nitro v3 validation + epic decomposition

[rickylabs]

Part of #823.

Seed run (use harness, .llm/harness/workflow/seed-run.md) producing the unified epic's board. Deliverables:

1. Nitro v3 validation corpus (cited): deno preset maturity, adapter surface (database/cache/KV/tasks/WebSocket/lifecycle) mapped against shipped @netscript adapters, whether the old "excludes sagas" constraint (epic: NetScript enterprise deployment framework (cloud-agnostic + bare-metal, CLI + Aspire) #327 D1, 2026-07-03 — STALE, predates live v3 docs) still holds, oRPC + Fresh 2 integration, cloud deploy presets.
2. Composition contract with multi-process mode: same app model; "macro services" = resource splitting across deploy targets (PR RFC: NetScript Single Deployment — process-managed apps, single & multi runtime (#820) #822 RFC §3/§D as the starting frame).
3. Epic decomposition: sub-issue drafts + milestone train; supersession map for feat(sdk): in-process link-mode adapter for single-process service mounting #451/feat(desktop): tursodb single-writer relocation + in-process composition root #453/feat(desktop): true single-process mode (option c) #454/feat(desktop): offline-first via Turso Sync in the single-process host #455 (re-homed here) and [Deploy-S13] WATCH: RFC-14 unified-mode + Nitro deno_server (tier-3 serverless) #349 (closed as superseded).
4. PLAN-EVAL PASS → owner ratification → one-shot filing (stage-H).

Design source: PR #822 (rfc.md + plan.md rev 10, 9-cycle adversarial trail) in .llm/runs/rfc-single-deployment--orchestrator/.