Add ADR-011: Azure Application Insights MCP Server

[xenobiasoft]

Description

Adds ADR-011 documenting the architectural decision to build a custom Sudoku.McpServer that exposes read-only Application Insights telemetry tools over the Model Context Protocol (MCP) HTTP+SSE transport, deployed as an Azure App Service.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Code refactoring
• Performance improvement
• Other (please describe):

Changes Made

• Added docs/adr/ADR-011-azure-mcp-server.md documenting the decision to create a custom MCP server for Azure Application Insights observability
• Covers context (why the portal workflow was insufficient), alternatives considered (pre-built Azure MCP server, direct REST API), and the chosen approach
• Documents all 6 exposed MCP tools (QueryLogs, GetExceptionSummary, GetRequestMetrics, GetGameTelemetry, GetActiveUsers, GetDependencyHealth)
• Captures authentication approach (Managed Identity via DefaultAzureCredential), configuration contract, and enforced rules

Testing

• I have tested these changes locally
• All existing tests pass
• I have added new tests (if applicable)

Screenshots (if applicable)

N/A — documentation-only change.

Checklist

• My code follows the project's coding standards
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• I have updated the documentation (if necessary)

[github-actions]

Azure Static Web Apps: Your stage site is ready! Visit it here: https://gray-bush-02024e71e-241.westus2.7.azurestaticapps.net