fix(ms-ai-architect): currency — Connected Agents deprecated, ny GA-modell Prompt/Hosted agents + Responses API (#5 del 3/3 agentspor)

Verifisert 2026-06-18 mot learn.microsoft.com/azure/foundry/agents/overview + classic-deprecation-bannere:
Connected Agents tilhører Foundry (classic), er DEPRECATED og pensjoneres 2027-03-31 — finnes IKKE i nye
Foundry Agent Service. Multi-agent skjer nå via Workflows (2025-11-15-preview) + A2A-tool (preview).
Ny GA-modell = Prompt agents (GA) + Hosted agents (preview), med Responses API som single entry point.

- foundry-agent-service-ga.md: deprecation-banner i header, reframet GA-feature-tabell, markert
  Connected Agents-seksjon + beslutningstre/modenhet som classic-bane
- multi-agent-orchestration-patterns.md: 2 Connected Agents-referanser markert classic/deprecated

validate-plugin: 219 PASS

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01REiKFhP4w6xGXXqWKpPCJJ

skills/ms-ai-engineering/references/agent-orchestration/multi-agent-orchestration-patterns.md

@@ -417,7 +417,7 @@ await Task.WhenAll(taskA, taskB); // Checkpoint ensures no replay
 
 ### Copilot Studio og M365 Copilot
 
-**Connected Agents (Foundry Agent Service):**
+**Connected Agents (Foundry classic — DEPRECATED, pensjoneres 2027-03-31; i ny Foundry Agent Service: Workflows `2025-11-15-preview` + A2A):**
 - Nondeterministic workflows (primært)
 - No-code/low-code environment
 - Begrenset pattern-support (primært simple routing)
@@ -554,7 +554,7 @@ scope.RecordOutputMessages(new[] { output });
 
 **Foundry Agent Service:**
 - Azure AI Foundry: Pay-per-use pricing (model API calls + hosting)
-- Connected Agents: Workflow orchestration, pay-per-invocation
+- Connected Agents (classic, deprecated 2027-03-31 → Workflows + A2A): Workflow orchestration, pay-per-invocation
 
 **Estimat (eksempel):**
 - Sequential (4 agenter × 1000 tokens/agent × $0.01/1K tokens) ≈ **$0.04 per run**