OBS Safe VST3 Host v0.4.0

What's Changed

• Hotfix v0.3.0-preview.1: Codex review + smarter installer by @masarray in #7
• S1: persist full VST3 component/controller state by @masarray in #10
• S2.1: detect hung helpers and bound recovery loops by @masarray in #12
• S2 final: isolate DSP, watchdog recovery, and checkpoint recreation by @masarray in #14
• Release v0.4.0 stable by @masarray in #18

Full Changelog: v0.3.0-preview.1...v0.4.0