docs(architect): weekly KB update — 66 files refreshed (2026-04)

Updated 66 stale knowledge base reference files (10 critical, 56 high)
across all 5 skills using Microsoft Learn MCP research.

Key factual updates:
- Groundedness Detection API: `correction` → `mitigating` param,
  `correctedText` → `correctionText` (breaking change)
- Copilot Studio: GPT-4.1 mini now default (was GPT-4o mini);
  Claude Sonnet 4.5 + Opus 4.5 added (experimental, 200K ctx)
- Agentic Retrieval: still public preview; 50M free tokens/month
- Azure security baselines: "Cognitive Services" → "Foundry Tools"
- Databricks: Delta Live Tables → Lakeflow Spark Declarative Pipelines
- MLflow 3 GenAI: new Feedback/Expectation data model
- Token tracking doc: "Azure OpenAI in Foundry Models through a gateway"
- Agent Registry: Risks column (M365 E7), Graph API (preview)
- Copilot DLP: new Entra AI Admin + Purview Data Security AI Admin roles
- ISO/IEC 42001: scope expanded to M365 Copilot, Foundry, Security Copilot
- Zero Trust: CAE now via Conditional Access, Strict Location Enforcement
- Purview: new Fabric Copilots/agents governance section
- AG-UI HITL: ApprovalRequiredAIFunction (C#), @tool approval_mode (Python)

All files: Last updated → 2026-04, *(Verified MCP 2026-04)* markers added.
Build registry: 1341 URLs from 387 files (+2 new URLs).

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

skills/ms-ai-security/references/ai-security-engineering/model-fingerprinting-watermarking.md

@@ -1,7 +1,7 @@
 # Model Fingerprinting and Watermarking for Attribution
 
 **Kategori:** AI Security Engineering
-**Dato:** 2026-02-05
+**Dato:** 2026-04
 **Status:** Active
 
 ---
@@ -536,6 +536,8 @@ Trenger kunde watermarking/fingerprinting?
 
 ---
 
+*(Verified MCP 2026-04)*
+
 ## Kilder
 
 1. **C2PA Specification** — https://c2pa.org/specifications/specifications/2.1/specs/C2PA_Specification.html
@@ -551,5 +553,5 @@ Trenger kunde watermarking/fingerprinting?
 
 ---
 
-**Sist oppdatert:** 2026-02-05
+**Sist oppdatert:** 2026-04
 **Neste review:** Q3 2026 (eller ved nye C2PA-oppdateringer)