docs(08-04): complete Phase 4 Nyquist audit plan

- Add 08-04-SUMMARY.md with 5/5 pass outcome
- Faithfully records Phase 10 RTVAL-02/03/04 attestation-only gap in Notes
- Update STATE.md (advance plan, add decision, record session)
- Update ROADMAP.md Phase 08 progress (4/8 summaries)

.planning/STATE.md

@@ -2,16 +2,16 @@
 gsd_state_version: 1.0
 milestone: v1.1
 milestone_name: Hardening & Validation
-current_plan: 4
+current_plan: 5
 status: completed
-stopped_at: Completed 08-03-PLAN.md (Phase 3 Nyquist audit)
-last_updated: "2026-04-13T14:03:22.405Z"
+stopped_at: Completed 08-04-PLAN.md (Phase 4 Nyquist audit)
+last_updated: "2026-04-13T14:07:02.282Z"
 last_activity: 2026-04-13
 progress:
   total_phases: 4
   completed_phases: 2
   total_plans: 17
-  completed_plans: 9
+  completed_plans: 10
 ---
 
 # Project State
@@ -27,7 +27,7 @@ See: .planning/PROJECT.md (updated 2026-04-13 after v1.0 milestone)
 
 Milestone: v1.1 Hardening & Validation
 Phase: 08 — Nyquist Validation Track — IN PROGRESS (1/8 plans complete)
-Current Plan: 4
+Current Plan: 5
 Total Plans in Phase: 8
 Status: Phase 08 active — 08-01 complete, NYQ-01 ticked
 Decision: 08-01 closed Phase 1 Nyquist audit with 14/14 pass rows; prior real-Intune spike (row 14) resolved PASS by citing Phase 10 RTVAL-01 sign-off rather than fail-fix-v1.1.
@@ -80,6 +80,7 @@ Full decision log in PROJECT.md Key Decisions table. Milestone v1.0 decisions ar
 - [Phase 08-nyquist-validation-track]: 08-01: Phase 1 Nyquist Record complete with 14/14 pass rows; row 14 (upload-to-real-Intune spike) resolved PASS citing Phase 10 RTVAL-01 sign-off rather than fail-fix-v1.1
 - [Phase 08-nyquist-validation-track]: 08-02: Phase 2 Nyquist Record complete with 6/6 pass rows; POST /drivers/upload 500 historical gap (row 6) closed as pass citing Phase 9 UX-01 fixing commits d1de839 + 10ee09a + 72c6a98
 - [Phase 08-nyquist-validation-track]: 08-03: Phase 3 Nyquist Record complete with 10/10 pass rows; PRNT-03 Alpine.js IP->port historical gap (row 3) closed as pass citing Phase 9 UX-02 Playwright fixing commits 322fc20 + 37a06da
+- [Phase 08-nyquist-validation-track]: 08-04: Phase 4 Nyquist Record complete with 5/5 pass rows; SYSTEM-context rows (SCRPT-01/02/03/04/05) cite Phase 10 RTVAL-02/03/04 with explicit attestation-only caveat per STATE.md 2026-04-13 faithfully recorded in Notes
 
 ### Active Blockers
 
@@ -93,6 +94,6 @@ None. BLOCKER-01 resolved 2026-04-13 via commits 74535ea (HMAC over IV+ciphertex
 
 ## Session Continuity
 
-Last session: 2026-04-13T14:03:22.399Z
-Stopped at: Completed 08-03-PLAN.md (Phase 3 Nyquist audit)
+Last session: 2026-04-13T14:07:02.277Z
+Stopped at: Completed 08-04-PLAN.md (Phase 4 Nyquist audit)
 Resume file: None