Fix/preact effect dependencies

[phh235]

What does this PR do?

Fixes stale subscription risks in the Preact component adapters by adding the missing subscribe
and getSnapshot dependencies to their internal synchronization effects.

This keeps the external-store snapshot and subscription in sync if either function changes.

Type of change

• Bug fix

Checklist

• npx tsc --noEmit passes
• npm run lint passes
• npm run build passes
• Tested in Chrome (with the html-in-canvas flag, if relevant)
• Tested the WebGL overlay fallback (flag off / Safari / Firefox), if a component changed