Replace click.MultiCommand with click.Group

[devin-ai-integration]

Summary

Migrates the CLI from the deprecated click.MultiCommand to click.Group. click.MultiCommand will be removed in click 9, so this change prepares the codebase for future click upgrades.

Changes:

• Changed ElementaryCLI base class from click.MultiCommand to click.Group
• Replaced @click.command with @click.group decorator
• Removed the _CMD_MAP dictionary and list_commands() method (now handled by click.Group internally)
• Register commands using cli.add_command() instead of dictionary lookup
• Updated get_command() to delegate to super().get_command() while preserving the auto_envvar_prefix setting

Review & Testing Checklist for Human

• Verify all CLI commands work: edr monitor --help, edr report --help, edr send-report --help, edr run-operation --help
• Verify edr --help shows all 4 commands correctly
• Test that environment variable prefix still works (e.g., EDR_* environment variables are recognized)

Recommended test plan: Install the package locally (pip install -e .) and run edr --help to verify the command list appears correctly, then test at least one subcommand end-to-end.

Notes

Fixes ELE-5220

Link to Devin run: https://app.devin.ai/sessions/68de447c968446cc850dc87532c97ffe
Requested by: Itamar Hartstein (@haritamar)

Summary by CodeRabbit

• Refactor
  • Enhanced the CLI command architecture to improve code maintainability and extensibility of the command structure.

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[devin-ai-integration]

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[linear]

ELE-5220 Replace click.MultiCommand with click.Group

[github-actions]

👋 @devin-ai-integration[bot]
Thank you for raising your pull request.
Please make sure to add tests and document all user-facing changes.
You can do this by editing the docs files in this pull request.

[coderabbitai]

Caution

Review failed

The pull request is closed.

📝 Walkthrough

Walkthrough

The CLI base class was migrated from the deprecated click.MultiCommand to click.Group. Command resolution now uses Click's native group mechanism with explicit command registration via add_command() calls instead of custom map-based lookups.

Changes

Cohort / File(s)	Summary
CLI migration from MultiCommand to Group elementary/cli/cli.py	Replaced click.MultiCommand inheritance with click.Group; removed _CMD_MAP static attribute and list_commands() method; delegated get_command() to parent class; changed decorator from @click.command to @click.group; injected public commands (monitor, report, send-report, run-operation) via explicit add_command() registration

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

🐰 Hop hop, the old ways fade,
MultiCommand's worn parade,
Click's Group now takes the lead,
Fresh paths for commands to heed! 🌱

✨ Finishing touches

• 📝 Generate docstrings

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_{Comment @coderabbitai help to get the list of available commands and usage tips.}