docs: Document README.md

[akamabu]

Documents apps/api/v2/README.md module purpose and public usage context

[github-actions]

Welcome to Cal.diy, @akamabu! Thanks for opening this pull request.

A few things to keep in mind:

• This is Cal.diy, not Cal.com. Cal.diy is a community-driven, fully open-source fork of Cal.com licensed under MIT. Your changes here will be part of Cal.diy — they will not be deployed to the Cal.com production app.
• Please review our Contributing Guidelines if you haven't already.
• Make sure your PR title follows the Conventional Commits format.

A maintainer will review your PR soon. Thanks for contributing!

[github-actions]

Hey there and thank you for opening this pull request! 👋🏼

We require pull request titles to follow the Conventional Commits specification and it looks like your proposed title needs to be adjusted.

Details:

Unknown release type "Docs" found in pull request title "Docs: Document README.md". 

Available types:
 - feat: A new feature
 - fix: A bug fix
 - docs: Documentation only changes
 - style: Changes that do not affect the meaning of the code (white-space, formatting, missing semi-colons, etc)
 - refactor: A code change that neither fixes a bug nor adds a feature
 - perf: A code change that improves performance
 - test: Adding missing tests or correcting existing tests
 - build: Changes that affect the build system or external dependencies (example scopes: gulp, broccoli, npm)
 - ci: Changes to our CI configuration files and scripts (example scopes: Travis, Circle, BrowserStack, SauceLabs)
 - chore: Other changes that don't modify src or test files
 - revert: Reverts a previous commit

[coderabbitai]

📝 Walkthrough

Walkthrough

This pull request adds a single module-level HTML comment to the top of apps/api/v2/README.md. The comment documents the module's purpose and public usage context. No other content in the file was modified.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
Title check	❓ Inconclusive	The title 'docs: Document README.md' is vague and overly generic, using the non-descriptive term 'Document' without specifying what documentation was added or what the module does.	Revise the title to be more specific about the change, such as 'docs: Add module purpose documentation to api/v2 README' or similar.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description check	✅ Passed	The description accurately identifies the file modified and specifies the documentation added regarding module purpose and public usage context.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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