feat: add event priority configuration option

[adevinwild]

Summary

• Add events option to plugin configuration for setting event priorities
• Re-export EventPriority from Medusa for convenience
• Use Events enum in API routes instead of hardcoded strings

Usage

import { EventPriority, Events } from "@perseidesjs/auth-otp"

{
  resolve: "@perseidesjs/auth-otp",
  options: {
    events: {
      [Events.OTP_GENERATED]: { priority: EventPriority.CRITICAL },
      [Events.PRE_REGISTER_OTP_GENERATED]: { priority: EventPriority.HIGH }
    }
  }
}

Test plan

• Build passes
• All HTTP integration tests pass (11/11)

🤖 Generated with Claude Code

[changeset-bot]

🦋 Changeset detected

Latest commit: 6734f0e

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@perseidesjs/auth-otp	Minor

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