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>

verify-rollout-system.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 # Verification script for Safe Agent Rollout System
-# Run on Saturn (172.16.3.30) to verify Phase 1-5 implementation
+# Run on gururmm-build (172.16.3.30) to verify Phase 1-5 implementation
 
 set -e