Plan viewer: own-time rendering, efficiency colors, wait stats polish

[erikdarlingdata]

Summary

• Own-time node display: Row-mode operators now show own CPU/elapsed by subtracting child times, so only true hotspots highlight red (not every operator above the bottleneck)
• Efficiency color coding in Runtime Summary: DOP, memory grant utilization, and thread usage all use white/yellow/orange/red scale (>=80% / >=60% / >=40% / <40%)
• Wait stats polish: Category color on wait type names (not bars), semi-transparent bars, auto-sizing columns with compact indicators, horizontal scroll fallback
• Insights panel: Expander stretches to fill full window width — no more gap at right edge

Test plan

• Row-mode parallel plans: only the leaf operators (seeks/scans) show red timing
• DOP efficiency percentage visible and color-coded in Runtime Summary
• Memory grant and thread utilization color-coded
• Wait stats names fully visible, duration text not clipped
• Wait stats panel fills to window edge

🤖 Generated with Claude Code