Add wait stats query drill-down (#372)#442
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Right-click any wait type in the chart legend to see queries causing it. Classifies waits into categories (correlated, chain, uncapturable, filtered) and shows the appropriate data: correlated metrics for brief waits like SOS_SCHEDULER_YIELD, head blockers for lock waits (LCK_M_*), and direct wait-type filtering for everything else. Chain mode shows the same full column set with blocking path prepended — no jarring layout changes. Both Dashboard and Lite. No new collectors needed. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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