fix: add request parameter to webhook_challenge for Netdata

[lalalic]

Summary

Fixes #6116

The webhook_challenge endpoint for Netdata was calling Request.query_params.get() on the Starlette Request class instead of a request instance. Since query_params is an instance property, this raises AttributeError on every request — making the Netdata webhook challenge completely broken.

Root Cause

# Before (broken): calls .get() on the class, not an instance
async def webhook_challenge():
    token = Request.query_params.get("token").encode("ascii")

Fix

# After (fixed): inject request instance via FastAPI dependency
async def webhook_challenge(request: Request):
    token = request.query_params.get("token").encode("ascii")

Changes

• Added request: Request parameter to webhook_challenge
• Changed Request.query_params → request.query_params

2-line fix. No tests needed — the bug is a straightforward Python instance vs class error.

[vercel]

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[shahargl]

lgtm

[github-actions]

👏 Fantastic work @lalalic! Your very first PR to keep has been merged! 🎉🥳

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