Sirius 0.6.1 Beta 1

Sirius 0.6.1 Beta 1

This is a debug-oriented follow-up to 0.6.0 Beta 2. It makes the production
provider boundary explicit so MLX Serve can be tested independently from the
experimental Native MLX and Elastic paths.

What changed

• MLX Serve is the default inference backend for Direct Qwen, fx, and BrowserCode.
• Native MLX is available only with the explicit development opt-in
  SIRIUS_NATIVE_INFERENCE=1.
• The status strip reports the selected backend (MLX SERVE, NATIVE MLX, or
  ELASTIC) instead of presenting ECO as if it were an engine choice.
• Model residency remains lazy so opening Sirius does not load a large model.
• Release metadata, update detection, and the public landing-page download now
  target this 0.6.1 Beta 1 artifact.
• Verified updates can now be installed with a single RESTART & INSTALL
  action: Sirius hands the SHA-256-checked DMG to a short-lived helper, exits,
  preserves a rollback copy, verifies the replacement, and relaunches.

Debug focus

When testing this build, record the backend label, selected model, available
unified memory, loopback health on port 11234, and direct-model tokens/second
before evaluating fx latency. The Flash-Next 4-bit preview remains an explicit
96 GB-class model selection and can fail its memory preflight on a busy Mac.

Package

• Version: 0.6.1 Beta 1
• Build: 28
• File: Sirius-0.6.1-beta.1-arm64.dmg