Enhance crawler with seed list and SQL utilities

Add seedList module for URL initialization, comprehensive SQL utilities for database analysis, and update project configuration.

misc/sql/recent_snapshot_activity.sql

@@ -0,0 +1,13 @@
+-- File: recent_snapshot_activity.sql
+-- Shows URLs with most snapshots in the last 7 days
+-- Usage: \i misc/sql/recent_snapshot_activity.sql
+
+SELECT 
+    url, 
+    COUNT(*) as snapshot_count
+FROM snapshots
+WHERE timestamp > NOW() - INTERVAL '7 days'
+GROUP BY url
+HAVING COUNT(*) > 1
+ORDER BY snapshot_count DESC
+LIMIT 20;