Bundle Lemonade with GAIA Installer

[kovtcharov]

Summary

Include Lemonade in the GAIA installer so users do not need a separate setup step. LLM download should be lazy: start with the smallest appropriate model and scale up as needed.

Requirements

• Lemonade is bundled and installed silently as part of GAIA install
• First LLM downloaded is the smallest model appropriate for detected hardware
• Larger models can be fetched later based on conversation/usage needs
• No manual Lemonade setup required
• Lemonade version: v10.0.0 (per recent PR Update Lemonade Server to v10.0.0 #498)

Technical Considerations

• Lemonade binary size and installer impact
• Platform-specific bundling (Windows service vs macOS/Linux daemon)
• Version pinning and update mechanism
• Health check integration with Agent UI

Acceptance Criteria

• Lemonade is bundled in all platform installers
• Lemonade starts automatically when GAIA launches
• No separate Lemonade download or configuration required
• Health check confirms Lemonade is running during initialization
• Lemonade version is v10.0.0 or later

[kovtcharov]

Absorbed into #530 — the desktop installer plan downloads Lemonade via the first-run setup wizard instead of bundling it (avoids 500MB+ installer). Moved to v0.17.1.