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/host_snapshot_stats.sql

@@ -0,0 +1,20 @@
+-- File: host_snapshot_stats.sql
+-- Groups snapshots by hosts and shows URLs with multiple snapshots
+-- Usage: \i misc/sql/host_snapshot_stats.sql
+
+SELECT 
+    host,
+    COUNT(DISTINCT url) as unique_urls,
+    SUM(CASE WHEN url_count > 1 THEN 1 ELSE 0 END) as urls_with_multiple_snapshots,
+    SUM(snapshot_count) as total_snapshots
+FROM (
+    SELECT 
+        host, 
+        url, 
+        COUNT(*) as snapshot_count,
+        COUNT(*) OVER (PARTITION BY url) as url_count
+    FROM snapshots
+    GROUP BY host, url
+) subquery
+GROUP BY host
+ORDER BY total_snapshots DESC;