Add weekly/monthly views for events and tool data summaries

New views:
- vwudcevents_monthly: Monthly event counts by machine/type
- vwudctooldata_weekly: Weekly tool data trends by machine/tool
- vwudctooldata_monthly: Monthly tool data trends by machine/tool

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

sql/udc_retention.sql

@@ -263,6 +263,43 @@ SELECT
 FROM udcevents_daily
 GROUP BY YEARWEEK(summarydate, 1), machinenumber, eventtype;
 
+-- Monthly event trends from daily summaries
+CREATE OR REPLACE VIEW vwudcevents_monthly AS
+SELECT
+    DATE_FORMAT(summarydate, '%Y-%m') as yearmonth,
+    machinenumber,
+    eventtype,
+    SUM(event_count) as event_count
+FROM udcevents_daily
+GROUP BY DATE_FORMAT(summarydate, '%Y-%m'), machinenumber, eventtype;
+
+-- Weekly tool data trends from daily summaries
+CREATE OR REPLACE VIEW vwudctooldata_weekly AS
+SELECT
+    YEARWEEK(summarydate, 1) as yearweek,
+    MIN(summarydate) as week_start,
+    machinenumber,
+    toolnumber,
+    SUM(measurement_count) as measurement_count,
+    SUM(oot_count) as oot_count,
+    ROUND(AVG(avg_deviation), 6) as avg_deviation,
+    MAX(max_deviation) as max_deviation
+FROM udctooldata_daily
+GROUP BY YEARWEEK(summarydate, 1), machinenumber, toolnumber;
+
+-- Monthly tool data trends from daily summaries
+CREATE OR REPLACE VIEW vwudctooldata_monthly AS
+SELECT
+    DATE_FORMAT(summarydate, '%Y-%m') as yearmonth,
+    machinenumber,
+    toolnumber,
+    SUM(measurement_count) as measurement_count,
+    SUM(oot_count) as oot_count,
+    ROUND(AVG(avg_deviation), 6) as avg_deviation,
+    MAX(max_deviation) as max_deviation
+FROM udctooldata_daily
+GROUP BY DATE_FORMAT(summarydate, '%Y-%m'), machinenumber, toolnumber;
+
 -- ============================================================================
 -- Usage Instructions
 -- ============================================================================