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-examples.md

@@ -223,7 +223,7 @@ Bruk denne når du skriver eller vurderer OKR:
 - [ ] Har vi 2-5 KR (ikke for få, ikke for mange)?
 
 ### Samlet
-- [ ] Maks 3-5 Objectives per team?
+- [ ] Maks 2-3 Objectives per team?
 - [ ] Kan vi verifisere suksess objektivt?
 - [ ] Er det klart hvem som eier hvert KR?
 - [ ] Ville dette imponere stakeholders hvis vi lykkes?