Improve Azure Deployment README for clarity and completeness

[anshulkhantwal]

Proposed changes

• Suggested usage of 1.2.0 docker image tag instead of latest as that has been tested for compatibility with Azure AI Foundry Agents.
• Added clarity around Managed Identity authentication parameters.
• Talked about --debug parameter to surface the detailed troubleshooting output for az deployment commands.

Checklist

• I have signed the MongoDB CLA

[Copilot]

Pull Request Overview

This PR improves the Azure deployment documentation and configuration for the MongoDB MCP server by specifying a tested Docker image version and clarifying authentication setup.

• Updates the Docker image reference from latest to 1.2.0, a version validated for Azure AI Foundry compatibility
• Adds comprehensive documentation for Managed Identity authentication parameters
• Expands the list of disabled tools to include aggregate and create-index for better Azure AI Foundry compatibility

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
deploy/azure/bicep/paramsWithAuthEnabled.json	Updates container image to v1.2.0, shortens app name, and adds aggregate/create-index to disabled tools
deploy/azure/bicep/params.json	Updates container image to v1.2.0, shortens app name, adds aggregate/create-index to disabled tools, and includes minor formatting change
deploy/azure/bicep/main.bicep	Updates default container image parameter to v1.2.0
deploy/azure/README.md	Adds explanation for v1.2.0 compatibility, documents Managed Identity auth parameters, and adds troubleshooting tip for --debug flag