chore(memory): fix shared-memory index issues

Audit of .claude/memory found and fixed:
- Broken link: Power Failure Runbook (../.claude/... -> ../...)
- 8 orphaned memories not in MEMORY.md index (Graph CA/password-reset,
  vault-write-sequence, GURU-BEAST-ROG, 3x Cascades, identity proposal)
  -> now indexed under their sections, so they're discoverable
- 5 files missing frontmatter -> added name/description/type
- Duplicate index entry for reference_workstation_setup.md -> deduped
- Trimmed the worst oversized index hooks (Syncro invoice line was 427 chars)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.claude/memory/gururmm-development-principles.md

@@ -1,3 +1,9 @@
+---
+name: GuruRMM Development Principles
+description: Every GuruRMM feature is full-stack (backend+API+UI+docs+scalability); product works without AI; the FEATURE_ROADMAP entry update is part of definition-of-done. Mirrors guru-rmm/docs/DESIGN.md.
+type: project
+---
+
 # GuruRMM Development Principles
 
 **Created:** 2026-04-29