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/SKILL.md

@@ -103,7 +103,7 @@ Default to team-OKR. Individual OKR is not recommended for most roles — in lin
 - Focus: alignment, ambition, transparency, learning
 
 ### Standards
-- 3-5 Objectives per team per cycle
+- 2-3 Objectives per team per cycle
 - 2-5 Key Results per Objective
 - Stretch goals: 0.7 scoring = good result; committed goals: 1.0 expected
 
@@ -148,6 +148,7 @@ All reference material is in `references/`:
 
 ### Governance
 - `okr-offentlig-governance.md` — Tildelingsbrev, political steering, audit readiness
+- `dfo-okr-mapping.md` — DFO terminology to OKR terminology bridge
 - `okr-implementation.md` — Rollout methodology and change management
 - `okr-integrations.md` — OKR + Scrum/Kanban/SAFe and tool integration
 - `individual-vs-team-okr.md` — Team vs individual OKR rationale and alternatives