fix: Correct server name from Saturn to gururmm-build

Saturn is decommissioned. The GuruRMM build server at 172.16.3.30
is correctly named 'gururmm-build'.

Also fixed wiki standards template that incorrectly listed Neptune
as 172.16.3.30. Neptune is actually the Exchange server at Dataforth
(172.16.3.11), not the GuruRMM build server.

Updated files:
- PHASE_6_TEST_PLAN.md (all Saturn references)
- verify-rollout-system.sh (comments)
- session-logs/2026-05-25-session.md (all Saturn references)
- .claude/specs/wiki-layer/standards.md (Neptune example)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

PHASE_6_TEST_PLAN.md

@@ -10,7 +10,7 @@
 ## Prerequisites
 
 ### Environment Setup
-- [ ] SSH access to Saturn (172.16.3.30)
+- [ ] SSH access to gururmm-build (172.16.3.30)
 - [ ] Access to GuruRMM dashboard (https://rmm.azcomputerguru.com)
 - [ ] JWT token for API testing
 - [ ] At least 2 test agents (GURU-KALI, GURU-5070 recommended)