BlogGen Connector v1.1.20 — Final Destination 200 KB Verification

This connector build adds a final safety pass and response verification for BlogGen featured images.

Changes:
- Hard-compresses the featured image immediately before attaching it to the post.
- Returns final image file size in bytes and KB to the Hub after media import and post publish.
- Reports whether the final client-site featured image is under the 200 KB target.
- Keeps the v1.1.19 original attachment compression behaviour.
