[MIGRATE] Fix edge case errors for get-discovered-server command

[saifaldin14]

---

This checklist is used to make sure that common guidelines for a pull request are followed.

Related command

az migrate get-discovered-server

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• Have you run azdev style <YOUR_EXT> locally? (pip install azdev required)
• Have you run python scripts/ci/test_index.py -q locally? (pip install wheel==0.30.0 required)
• My extension version conforms to the Extension version schema

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• My extension description/summary conforms to the Extension Summary Guidelines.

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You only need to update the version information in file setup.py and historical information in file HISTORY.rst in your PR but do not modify src/index.json.

[azure-client-tools-bot-prd]

⚠️Azure CLI Extensions Breaking Change Test

⚠️migrate

rule	cmd_name	rule_message	suggest_message
⚠️ 1009 - ParaPropRemove	migrate local replication list	cmd migrate local replication list update parameter project_name: removed property id_part=name

[azure-client-tools-bot-prd]

Hi @saifaldin14,
Please write the description of changes which can be perceived by customers into HISTORY.rst.
If you want to release a new extension version, please update the version in setup.py as well.

[yonzhan]

Thank you for your contribution! We will review the pull request and get back to you soon.

[github-actions]

The git hooks are available for azure-cli and azure-cli-extensions repos. They could help you run required checks before creating the PR.

Please sync the latest code with latest dev branch (for azure-cli) or main branch (for azure-cli-extensions).
After that please run the following commands to enable git hooks:

pip install azdev --upgrade
azdev setup -c <your azure-cli repo path> -r <your azure-cli-extensions repo path>

[github-actions]

• For more info about extension versioning, please refer to Extension version schema

[Copilot]

Pull request overview

This PR fixes edge case errors in the az migrate get-discovered-server command by improving handling of different API response formats and machine identification patterns.

Changes:

• Updated source machine name field to use sourceVmName instead of sourceMachineName in protected item formatting
• Added support for extracting machine names from full resource IDs
• Enhanced server data handling to support both list and single-item API responses
• Extended filtering and extraction logic to handle different API endpoint formats (Microsoft.Migrate vs Microsoft.OffAzure)

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 5 comments.

File	Description
src/migrate/azext_migrate/helpers/replication/list/_execute_list.py	Changed to use sourceVmName field from API response for source machine name
src/migrate/azext_migrate/helpers/_server.py	Added resource ID parsing, enhanced response handling for single items vs lists, and improved data extraction for different API formats
src/migrate/azext_migrate/custom.py	Integrated machine name extraction and removed OData filter (moved to client-side filtering)

[azclibot]

[Release] Update index.json for extension [ migrate-3.0.0b3 ] : https://dev.azure.com/msazure/One/_build/results?buildId=149279443&view=results