OBS Safe VST3 Host v0.5.0

What's Changed

• Fix VST3 editor auto-open and installed scanner regressions by @masarray in #19
• Prepare v0.4.1-rc.1 scanner/editor trial by @masarray in #20
• docs: define North Star PRD and staged engineering roadmap by @masarray in #24
• docs: canonicalize Gate 0 stabilization direction by @masarray in #25
• Stabilize Phase S: OBS-root install, editor policy, scanning, and OBS 29+ compatibility by @masarray in #22
• S1.1: define lifecycle restart behavior matrix by @masarray in #27
• S1.2: tolerate advisory setComponentState results by @masarray in #29
• S1.3: implement latency changed lifecycle transaction by @masarray in #31
• S1.4: refresh parameter values and metadata coherently by @masarray in #33
• S1.5: handle dynamic VST3 I/O safely by @masarray in #35
• S1.6: implement bounded kReloadComponent recreation by @masarray in #40
• S1.7: deterministic VST3 process-context contract by @masarray in #42
• Release v0.5.0 stable: iZotope compatibility + native VST3 workflow by @masarray in #51
• S1.8/S1.8d: strict VST3 lifecycle + kNotImplemented processing compatibility by @masarray in #45

Full Changelog: v0.4.0...v0.5.0