Translation Manager: shipped v18.3.0, forward-port + pre-release checks

Repo: Jumoo/Jumoo.TranslationManager.Issues

Translation Manager: checked v17/main → v18/main forward-port status — already in sync, nothing outstanding
Translation Manager: triggered a manual pre-release build on v18/main to the nightly feed
Translation Manager: confirmed all bundled connector NuGet pins (Google, Microsoft, Xliff, Passthrough, DeepL, AI) are already at their latest published versions
Translation Manager: released v18.3.0 — global Glossary, granular glossary/translation-memory permissions, retry-pipeline and correctness fixes forward-ported from v17; published customer-facing notes on the Issues repo
Triggered a refresh of the releases.jumoo.co.uk feed after the release