Summary

• Add 3 missing columns to Query Trace Patterns grid (AvgWrites, Recommendation, QueryPattern with tooltip)
• Remove redundant SampleQueryText column (duplicate of QueryPattern)
• Create TracePatternHistoryWindow drill-down (double-click pattern → individual executions over time with chart)
• Deduplicate trace events with ROW_NUMBER (trace file retains events across collection cycles)
• Add hover tooltips to all query text columns across entire Dashboard (matching Lite behavior)
• Apply DarkToolTip as implicit default so all tooltips use dark theme
• Switch query text cells to TextWrapping with MaxHeight=90, remove fixed RowHeight for auto-sizing rows

Closes #273

Test plan

• Build succeeds with 0 errors/warnings
• Query Trace Patterns grid shows AvgWrites, Recommendation, QueryPattern columns
• SampleQueryText column removed (was redundant)
• Double-click pattern row opens drill-down with chart + detail grid
• Drill-down shows deduplicated rows (no duplicate trace events)
• Header text sanitized (newlines collapsed, truncated to 120 chars)
• Hover tooltips work on all query text columns with dark theme styling
• Query text cells wrap up to ~3-4 lines with auto-sizing rows

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