Summary

• Adds a new Current Waits tab to the Blocking section in both Dashboard and Lite, positioned next to the existing Blocking/Deadlock Trends tab
• Two charts per app: Wait Duration by Wait Type (multi-series line, total wait_duration_ms per wait type over time) and Blocked Sessions by Database (multi-series line, count of sessions with blocking_session_id > 0 per database over time)
• Uses raw point-in-time wait_duration_ms values — no delta calculation needed since waiting_tasks snapshots the current wait state, not cumulative counters
• Aligns Lite collector with the SQL Server collector trimmed in Data audit: collected but not displayed gaps #281 — stops collecting resource_description (now NULL)

Test plan

• Connect both apps to a server with active blocking
• Verify Current Waits tab appears second in tab order (after Trends/Blocking/Deadlock Trends)
• Wait ~1 min for collection, verify wait duration chart shows lines per wait type
• Verify blocked sessions chart shows lines per database when blocking is present
• Verify empty state (flat zero line / no data message) when no waiting tasks collected
• No regressions on existing Blocking/Deadlock Trends, Blocking, Deadlocks tabs

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