Explore the statistics: a query log to drill down by client, name, view and more; storage on the dashboard

jarld keeps every answer for a while (stats.retention.queries, default 7 days) in the statistics database: time, client, view, name, type, result and what blocked it. Every client, name, view, record type, result and blocklist on the Statistics page leads to an explore page for it: answers over time, the top values of every other dimension (each a link that narrows further) and the latest answers. GET /stats/explore.

The dashboard shows the size of Jarl's databases (and the query log's rows) and, per disk Jarl uses, how full it is and the databases' share.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

CHANGELOG.md

@@ -60,6 +60,17 @@ All notable changes to Jarl are documented here. The format follows
 - Comparing one name across views: `jarl zone diff adbraun.lol nas [A]`,
   and a **Compare** button on each record.
 
+- **Exploring the statistics**: jarld keeps every answer for a while
+  (`stats.retention.queries`, default 7 days), and every client, name,
+  view, record type, result and blocklist on the Statistics page leads to
+  an explore page for it: answers over time, the top clients, names,
+  views, types, results and blocklists among them (each a link that
+  narrows it further), and the latest answers. "NXDOMAIN in external" →
+  the clients asking → everything one of them asks. `GET /stats/explore`.
+- **Storage** on the dashboard: the size of Jarl's databases (and how many
+  answers the query log holds), and per disk Jarl uses a bar of how full it
+  is and how much of it the databases take.
+
 ### Changed
 
 - **Compare views** and `jarl zone diff` are rebuilt around the view
@@ -83,6 +94,8 @@ All notable changes to Jarl are documented here. The format follows
   starts; a 0.5 jarld can't open it afterwards, so take a backup first (`sudo
   jarld backup`). Nothing changes until you turn `auto_ptr` on for a
   zone.
+- The statistics database gets a new version too (the query log); 0.5
+  can't open it afterwards either. It starts empty and fills from then on.
 
 ## [0.5.2] - 2026-10-12