[puppeteer] Add orbit-anchor validation badge

[S1mplector]

Module: Puppeteer

Goal:
Flag orbit-anchored layers that are likely to export or reload incorrectly.

Acceptance criteria:

• Layers with orbit anchors and rotation keyframes show a validation state.
• Badge warns when pivot metadata or anchor references are missing.
• Clicking the badge explains what will export and what may be lost.
• Validation is included in export/register confirmation popups.

Notes:
Keep this as creator-facing guidance; do not block export unless the user chooses strict validation.