docs(phase-10): record RTVAL-04 PASS (technician attestation, no artifact)

- Status: PASS (attested, no artifact) — third consecutive attestation-only check
- No uninstall log or portal screenshot captured
- Technician verbally confirmed uninstall under SYSTEM, clean removal from ARES-5CG5220YTM
- RTVAL-02/03/04 together constitute an attestation-only runtime half for Phase 10
- User warned twice and still chose attestation-only; audit trail weakened
- Top-level Status line updated to reflect all four RTVAL checks recorded

.planning/phases/10-real-world-runtime-validation/RUNTIME-VALIDATION.md

@@ -1,6 +1,6 @@
 # Runtime Validation Report — ImpTune v1.1
 
-**Status:** IN PROGRESS — RTVAL-01 PASS (re-test 2026-04-13); RTVAL-02 PASS (attestation-only, no artifact); RTVAL-03 PASS (attestation-only, no artifact — 2nd consecutive); plan 10-02 paused at Task 4 (RTVAL-04 uninstall under SYSTEM)
+**Status:** IN PROGRESS — all four RTVAL runtime checks recorded (1 artifact-backed, 3 attestation-only): RTVAL-01 PASS (re-test 2026-04-13, artifact-backed); RTVAL-02 PASS (attestation-only, no artifact); RTVAL-03 PASS (attestation-only, no artifact — 2nd consecutive); RTVAL-04 PASS (attestation-only, no artifact — 3rd consecutive). Plan 10-02 complete; awaiting sign-off in plan 10-03.
 **Started:** 2026-04-13
 **Signed off by:** <name>
 **Signed off date:** <YYYY-MM-DD>
@@ -41,9 +41,10 @@ Evidence: Attested by technician — no portal screenshot or detect transcript c
 Notes: ATTESTATION-ONLY — this check is NOT artifact-backed. This is the **second consecutive attestation-only check** (RTVAL-02 was also attestation-only), which further weakens the audit trail for plan 10-02. No `evidence/rtval-03-detection.png` (Intune portal "Installed" screenshot) and no `evidence/rtval-03-detect-manual.txt` (manual detect script run transcript with exit code 0) were captured. The three required observations (Intune portal status = Installed, manual detect script exit 0, printer visible via `Get-Printer`) were NOT independently verified; PASS rests entirely on the technician's verbal report. User was explicitly warned that a second consecutive attestation-only check weakens the audit trail and still chose to proceed without evidence on 2026-04-13. For any future regression, incident investigation, or phase sign-off, RTVAL-02 and RTVAL-03 should be treated as soft PASSes and re-run with full artifact capture before the phase is closed.
 
 ## RTVAL-04 — Uninstall under SYSTEM
-Status: BLOCKED — depends on RTVAL-01 PASS; RTVAL-01 returned FAIL (Intune cannot parse generated .intunewin). Cannot proceed until package structure defect is resolved.
-Evidence: (none — test not reached)
-Notes:
+Status: PASS (attested, no artifact)
+Tested: 2026-04-13
+Evidence: Attested by technician — no uninstall log or portal screenshot captured. Audit trail weakened. Technician verbally confirmed Intune uninstall ran under SYSTEM, exited cleanly, and printer was removed from ARES-5CG5220YTM.
+Notes: ATTESTATION-ONLY — this check is NOT artifact-backed. This is the **third consecutive attestation-only check** (RTVAL-02, RTVAL-03, and RTVAL-04 are all attestation-only). Together, RTVAL-02/03/04 constitute an **attestation-only runtime half for Phase 10**: only RTVAL-01 (tenant ingestion) is artifact-backed for this plan. No `evidence/rtval-04-uninstall-log.txt` (IntuneManagementExtension.log excerpt showing SYSTEM context + exit 0) and no `evidence/rtval-04-uninstall-status.png` (Intune portal "Not installed" screenshot) were captured. The four required observations (uninstall script ran under `NT AUTHORITY\SYSTEM`, exit code 0, printer gone via `Get-Printer`, Intune portal shows "Not installed") were NOT independently verified; PASS rests entirely on the technician's verbal report. User was explicitly warned twice — first on RTVAL-03 and again on RTVAL-04 — that consecutive attestation-only checks significantly weaken the audit trail for Phase 10, and still chose to proceed without evidence on 2026-04-13. For any future regression, incident investigation, or phase sign-off, RTVAL-02/03/04 should all be treated as soft PASSes and re-run with full artifact capture before the phase is closed.
 
 ## Issues Found