BlogGen Connector v1.1.17 — Client-side 200 KB Image Compression

Fixes BlogGen images arriving in the client WordPress Media Library as large originals.

Changes:
- Compresses imported BlogGen featured images inside the Connector.
- Target size is 200 KB where WordPress image libraries allow it.
- Resizes and recompresses multiple passes until the image is small enough.
- Uses JPG and WebP when available, selecting the smallest output.
- Replaces the attachment file reference so the Media Library shows the optimised image.
- Applies to secure media imports, URL import during publish and embedded/base64 image fallback.
