feat(okr): sync to v1.3.0 from ktg-privat

Syncs all changes from v1.0.0 through v1.3.0:

v1.1 (quick fixes):
- Fix deprecated Viva Goals references
- Add DFO-OKR terminology mapping
- Add tillitsvalgt/fagforening perspective
- Update Objectives recommendation from 3-5 to 2-3

v1.1 (persistent context):
- Deep onboarding interview (full/mvp)
- Persistent .claude/okr/ directory tree
- Context-aware commands
- Cycle archival with retrospective

v1.3 (AI-first differentiators):
- /okr:gap — tildelingsbrev gap analysis with coverage matrix
- /okr:analyse — cross-cycle Mermaid analytics
- SessionStart coaching hook (proactive, phase-aware)
- gapanalytiker + trendanalytiker agents
- inject-okr-context.mjs extended for historikk/

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

plugins/okr/skills/okr-offentlig-sektor/references/okr-cheatsheet.md

@@ -32,7 +32,7 @@ Key Results = Hvordan vi måler suksess (2-5 målbare outcomes)
 → ✅ Vær spesifikk: "Redusere responstid fra 5 til 2 dager"
 
 ❌ **For mange OKR**: 10 objectives  
-→ ✅ Maks 3-5 objectives per team
+→ ✅ Maks 2-3 objectives per team
 
 ❌ **For lett mål**: "1% forbedring"  
 → ✅ Vær ambisiøs: "20% forbedring" (0.7 er suksess)