docs: point canonical state at Campaign N; record Campaign V closed

CLAUDE.md''s read-first list and the roadmap header now carry Campaign N
(retail reliable-transport port) as the active campaign and Campaign V
as the closed record.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

CLAUDE.md

@@ -572,7 +572,8 @@ render/streaming work at `claude-memory/project_render_pipeline_digest.md`.
 Documentation entry point: [`docs/README.md`](docs/README.md).
 
 For canonical state, read in this order:
-- [`docs/plans/2026-07-27-vulkan-campaign.md`](docs/plans/2026-07-27-vulkan-campaign.md) — **ACTIVE: Campaign V, OpenGL → Vulkan.** The pinned RHI contract, the Vulkan technical decisions, the V0–V11 slice table with per-slice gates, and the subagent execution rules. Read this before touching anything under `src/AcDream.App/Rendering/`. ImGui dev tools and UI Studio are NOT ported and are deleted at V11.
+- [`docs/plans/2026-07-29-network-transport-campaign.md`](docs/plans/2026-07-29-network-transport-campaign.md) — **ACTIVE: Campaign N, the retail reliable-transport port.** The #260 root cause (no packet-loss recovery in either direction), the retail mechanism map with symbols, the ACE constraint table, slices N0–N6 with gates and review assignments, and the landmine list. Read this before touching anything under `src/AcDream.Core.Net/`.
+- [`docs/plans/2026-07-27-vulkan-campaign.md`](docs/plans/2026-07-27-vulkan-campaign.md) — Campaign V, OpenGL → Vulkan — **CLOSED 2026-07-29**; the completed record of the RHI contract, V0–V11 slices, and the GL deletion. Historical reference for `src/AcDream.App/Rendering/`.
 - [`docs/plans/2026-05-12-milestones.md`](docs/plans/2026-05-12-milestones.md) — milestone targets + freeze list per milestone
 - [`docs/plans/2026-04-11-roadmap.md`](docs/plans/2026-04-11-roadmap.md) — what's shipped, what's in flight, what's next
 - [`docs/ISSUES.md`](docs/ISSUES.md) — open + recently closed bugs (tactical)