feat: add wizard e2e test query edge case

[jonathanlab]

Problem

To support the fixture generation during E2E tests in the @posthog/wizard package, we need to support mocking the cache value, since we never authenticate through the browser in the E2E flow.

Context: PostHog/wizard#101

Changes

• Add the ability to mock wizard data if PostHog is running in debug and the X-PostHog-Wizard-Fixture-Generation header is specified.
• Upped the Wizard rate limit in development.

How did you test this code?

Added tests for checking the changed functionality.

Did you write or update any docs for this change?

• No docs needed for this change

---

👉 Stay up-to-date with PostHog coding conventions for a smoother review.

[greptile-apps]

Greptile Summary

This PR adds support for fixture generation in E2E tests for the @posthog/wizard package by introducing the ability to mock wizard data in debug mode and increasing rate limits for development environments. The changes involve two main components:

1. Adding support for mock wizard data when PostHog is running in debug mode and a specific header (X-PostHog-Wizard-Fixture-Generation) is present
2. Increasing the wizard rate limit in development from 20/day to 1000/day

The test coverage is comprehensive, with new test cases that verify both the positive and negative scenarios for mock data usage.

Confidence score: 2/5

1. Can be merged with caution, but needs attention to critical issues.
2. There is a critical bug in the rate limit setting that needs to be fixed.
3. The rate limit change in rate_limit.py needs immediate attention.

The bug in rate_limit.py is severe - the rate setting code has an assignment error. The line:

if settings.DEBUG:
    "1000/day"

This code creates a string literal but doesn't assign it to anything. It should be:

if settings.DEBUG:
    rate = "1000/day"

This bug means that the rate limit will remain at 20/day even in debug mode, which will affect the E2E testing functionality this PR aims to enable.

_{2 files reviewed, 1 comment}

_{Edit Code Review Bot Settings | Greptile}

[joshsny]

🚢