Next3 Offload v4.5.2

**Fixed** * Googlebot, PageSpeed, and Lighthouse requests were always served the attachment's local URL instead of its cloud URL, even with local files removed after offload (this plugin's own recommended configuration) — meaning every crawl or performance-test hit returned links to files that no longer existed on disk. A page cache keyed by URL rather than by user-agent (several popular caching plugins) could then store that broken render and serve it to real visitors too, until the cache entry expired. The local URL is now only used when that local file is actually still present; otherwise the normal cloud URL is served. * An attachment was only ever offloaded once. If new derivative image sizes were generated for it afterward — for example after a crop-size setting change, or via WooCommerce's on-demand thumbnail regeneration — those new files were never uploaded to the cloud, while the plugin continued rewriting every size's URL to the cloud regardless, producing 404s for every newly-generated size. The plugin now also listens for WordPress's standard attachment-metadata-update event (not just the full regeneration pass triggered by a new upload or the "Regenerate Thumbnails" tool) and re-checks for any size that isn't accounted for yet, uploading just the new files without repeating work already done. * The license activation screen could report "Your hosting firewall (SiteGround Bot Protection) blocked the license request" on hosts that have nothing to do with SiteGround. That message is now only shown when the license server's response actually carries SiteGround's own signature; any other redirect instead shows an accurate message that includes where the request was redirected to, so a real block elsewhere in the request path can actually be diagnosed.