[APP] Polotno Studio — design rendering API

**Name of app / service**

Polotno Studio

**Link to developer documentation**

https://polotno.com/studio/docs (OpenAPI spec: https://api.studio.polotno.com/openapi.json)

https://polotno.com/for-creators/features

**Is lack of support preventing you from moving forward, or do you have a workaround?**

I work on Polotno Studio and have already built the Pipedream components locally (app file + 5 actions + an instant webhook source), verified against the production API. I'm requesting the registry app entry plus custom API-key auth so I can open the components PR. Auth is a single API key sent as `Authorization: Bearer `. Please register the custom-auth field as `api_key` (the components read `this.$auth.api_key`). Suggested test request: `GET https://api.studio.polotno.com/v1/me`.

**Are there specific actions or triggers you'd like to see for this app? Please let us know here or use the Action and Trigger issue templates to open requests for each!**

Actions: Render Image (POST /v1/images), Render Video (POST /v1/videos), Get Render, Get Template, List Templates.
Source (instant webhook): New Render Event — HMAC-SHA256 signed (`x-signature: t=,v1=`), events: image/video completed/failed, template created/updated.

All built and ready to open as a `components/polotno_studio/` PR once the app entry and auth schema exist.

Review the app registry and custom-auth conventions, then inspect the requested components/polotno_studio/ entry. Verify the auth schema with GET https://api.studio.polotno.com/v1/me and confirm the registry entry supports the listed actions and instant webhook source.

Written by the indexing model from the issue text.