Add Dynamics 365 F&O consultant subagent

[plevantis]

Summary

• Adds .claude/agents/dynamics-365-fo-consultant.md, a Claude Code subagent specialized in Microsoft Dynamics 365 Finance & Operations.
• System prompt covers functional modules (GL/AP/AR, WMS, Production, Project), the X++/AOT technical stack, LCS/ALM, and adjacent Power Platform / Dataverse integration.
• Encodes working principles: standard-before-extension, version-aware answers, idiomatic modern X++ (Chain of Command, set-based ops), security/SoD awareness, and explicit guardrails (no over-layering in cloud, no direct SQL DML, no SoD bypass).

Test plan

• Run /agents in Claude Code and confirm dynamics-365-fo-consultant is listed.
• Invoke via the Agent tool with a sample functional question (e.g., "How do I configure a posting profile for AR?") and confirm the response style matches the prompt.
• Invoke with a sample X++ question (e.g., "Show me Chain of Command on SalesTableType::insert") and confirm the code style is correct.
• Confirm the tools: allowlist is sufficient — agent should not need write access for advisory work.

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