v0.1.9 — macOS live status and diagnostics

macOS diagnostics and status fix

• The OBS filter's Status line now refreshes when the connection changes instead of remaining on an old “disconnected / reconnecting” message.
• Adds a real Show diagnostics / help button with connection state, captured/sent audio counters, recent delivery, queue size, errors and the last server close code. Plugin keys are excluded.
• Explains account/trial restrictions, exhausted hours and rejected keys; these do not retry endlessly.
• Declares the Mac installer's arm64 architecture to avoid unnecessary Intel/Rosetta relaunches.
• macOS installer signed with Developer ID, accepted by Apple's notary service, stapled and verified with Gatekeeper.

Quit OBS, download and install the new .pkg, then reopen OBS. Existing keys/settings are retained. Installer/admin-password prompts are normal; bypassing Gatekeeper is not required.

Platform scope: macOS plugin is v0.1.9. Windows and Linux assets are unchanged v0.1.8 binaries included to preserve existing download links. No two-speaker/stereo functionality is added to this Mac release.

Verification: native libobs deferred UI refresh/diagnostics tests, retry-policy tests, native WebSocket reconnect/PCM tests, installer payload/version inspection and Gatekeeper assessment passed. Live OBS UI verification follows installation.