Add scan stats report

sql/stats.sh

@@ -0,0 +1,24 @@
+#!/usr/bin/env bash
+
+sqlite3 badger.sqlite3 -batch "SELECT browser.name,
+    no_blocking,
+    num_sites,
+    COUNT(DISTINCT blocked_trackers.tracker_id) num_blocked,
+    ((CAST(STRFTIME('%s', end_time) AS INT) - CAST(STRFTIME('%s', start_time) AS INT)) / 60 / 60),
+    start_time
+  FROM scan
+  JOIN browser ON browser.id = scan.browser_id
+  JOIN (SELECT scan.id AS scan_id,
+      tr.tracker_id
+    FROM scan
+    JOIN browser ON browser.id = scan.browser_id
+    JOIN tracking tr ON tr.scan_id = scan.id
+    WHERE scan.daily_scan = 1
+      AND scan.start_time > DATETIME('now', '-30 day')
+    GROUP BY tr.scan_id, tr.tracker_id
+    HAVING COUNT(DISTINCT tr.site_id) > 2)
+      AS blocked_trackers ON blocked_trackers.scan_id = scan.id
+  WHERE scan.daily_scan = 1
+    AND scan.start_time > DATETIME('now', '-30 day')
+  GROUP BY scan_id
+  ORDER BY scan.start_time DESC" | column -s '|' -t