[medium] Add rate limiting guard to passkeykit-connector authentication calls

[davedumto]

Summary

passkeykit-connector.ts has no rate limiting guard on authentication attempts, making it easier for a caller bug or abuse to hammer the passkey flow.

Requirements

• Add a client-side rate limiter keyed on connector instance
• Reject excess attempts with a typed RateLimitError
• Add tests verifying limiter behavior under repeated attempts
• Document the limiter configuration in the README

[beetecch]

@beetecch has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi, I’d like to work on this issue. I’ll review how passkeykit-connector currently handles requests and add the rate limiting guard using the project’s existing patterns. I’ll also add the relevant tests and make sure the guard doesn’t interfere with the existing authentication flow.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @beetecch to this issue.

[devfoma]

@devfoma has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Gm Chief, I would love to take on this issue. I'm a software engineer with over four years experience and i'm confident I can resolve this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @devfoma to this issue.

[drips-wave]

Congratulations, @devfoma! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

🧑‍💻 @devfoma: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

Warning

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