Add daily derived data pipeline

docs/minute_bar_data.md

@@ -16,17 +16,20 @@ The default layout is:
 data/minute_bars/{universe}/frequency=5m/month=YYYY-MM/*.pq
 ```
 
-Feature plugins can aggregate those bars to daily `symbol_id,date` feature
+Derived-data plugins can aggregate those bars to daily `symbol_id,date` numeric
 files, for example:
 
 ```bash
-uv run python cli.py feature compute \
+uv run python cli.py derived compute \
     --minute-path data/minute_bars/sh600000 \
     --daily-path data/daily_bars/sh600000 \
-    --feature-type minute_daily_summary \
-    --feature-name minute_summary
+    --derived-type minute_daily_summary \
+    --derived-name minute_summary
 ```
 
+The legacy `feature compute` command delegates to the same derived-data
+registry and remains available for existing scripts.
+
 ## Daily vs Minute Reconciliation
 
 Baostock's daily raw bars and 5-minute raw bars are close, but they should not