Rename PyPI package to cpex-rate-limiter and update CLAUDE.md

[jonpspri]

Summary

• Rename PyPI package from cpex-rate-limiter-plugin to cpex-rate-limiter
• Expand CLAUDE.md with repository structure, build/test commands, DCO sign-off requirement, and coding conventions

Test plan

• pip install cpex-rate-limiter works after next publish
• CI passes on all platforms

[Copilot]

Pull request overview

This PR updates packaging metadata and contributor/agent documentation for the repository’s plugin workflow, primarily to reflect a new PyPI distribution name for the rate limiter plugin.

Changes:

• Renames the rate limiter plugin’s PyPI package from cpex-rate-limiter-plugin to cpex-rate-limiter in pyproject.toml.
• Expands repository guidance (structure, build/test commands, conventions, DCO sign-off) in documentation.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
rate_limiter/pyproject.toml	Updates the Python distribution name to the new cpex-rate-limiter package name.
AGENTS.md	Adds expanded repo structure and build/test/conventions guidance (but currently appears to duplicate/overlap with CLAUDE.md).

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[Copilot]

This file is named AGENTS.md but its top-level heading says # CLAUDE.md, and the PR description says it updates CLAUDE.md (the repo also has a separate CLAUDE.md). Please align the filename/heading and PR description—either move these instructions into CLAUDE.md (and keep AGENTS.md agent-specific), or update the heading to # AGENTS.md and adjust the PR metadata accordingly to avoid confusion/duplication.

[Copilot]

The wording here could be read as only requiring DCO sign-off, but other repo docs mention “Git with commit signing configured” (cryptographic commit signing). Please clarify whether the project requires (a) DCO sign-off only, (b) GPG/Sigstore commit signatures as well, or (c) both, and make the terminology consistent across docs.

Suggested change

	- All commits must include a DCO sign-off line. Always use `git commit -s` (or pass `-s` when committing).
	- All commits must be cryptographically signed (for example, using GPG or Sigstore with Git commit signing configured) **and** must include a DCO sign-off line. Always use `git commit -S -s` (or equivalent flags when committing).