Add the Analytics section: check runs, analytics API and page

Runs (migration 0011): a run groups the cycles of one launch. It opens when an
address enters an idle queue, takes everything submitted or re-checked while it
is open and is finalized when all its addresses are done; a re-check after that
opens a new run, so results of different runs never mix. check_runs,
run_results (one result per address and run, with the verdict and the expected
and stored check counts), subnets, run_id on ip_queue and checks. Existing data
is split into runs at pauses of more than an hour; ingress checks get the
validator that held the address (also at write time from now on).

Analytics (internal/analytics): figures computed from the stored checks of the
latest cycle of each address in the run, as facts next to the verdict: summary,
reasons of partial, data quality, subnets, targets and the subnet x target
matrix by check type, ingress by site, error classes, validators, and the
address lists behind the indicators and error classes. API: analytics runs,
report, lists (JSON or CSV), subnet list; run and subnet filters for the
registry.

Dashboard: /analytics matching the approved mockup (run selector, indicators
with address lists and CSV, error-class dialogs, drill-down to the registry),
subnet list on /settings. Sidebar: the control-api link state, theme toggle and
logout moved to the top, the three dots next to the logo removed, sections
grouped.

Rebuilt bin/control-api and bin/admin-dashboard to match. Plan, summary and the
updated README, API, USAGE, DASHBOARD and ADMIN_CLEANUP docs are in docs/.

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

internal/dashboard/templates/layout.html

@@ -36,14 +36,29 @@
 {{define "sidebar_nav"}}
 <aside class="sidebar">
 <div class="brand">
-<span class="brand-chrome"><i></i><i></i><i></i></span>
 <span class="brand-mark">
 <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M12 2v6M12 16v6M2 12h6M16 12h6"/><circle cx="12" cy="12" r="3"/></svg>
 </span>
 <span class="brand-name">Cloud IP Validator<small>admin</small></span>
 </div>
 
-<nav class="nav-groups">
+<div class="sidebar-session">
+{{$down := and .Banner.Message (not .Banner.Client)}}
+<div class="session-row">
+<span class="session-api" title="{{if $down}}Нет связи с control-api: {{.Banner.Message}}{{else}}Связь с control-api в порядке{{end}}"><span class="pulse-dot{{if $down}} down{{end}}"></span>control-api{{if $down}} · нет связи{{end}}</span>
+<button type="button" class="theme-toggle" id="themeToggle" aria-label="Переключить тему" title="Переключить тему">
+<svg class="icon-sun" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><circle cx="12" cy="12" r="4"/><path d="M12 2v2M12 20v2M4.9 4.9l1.4 1.4M17.7 17.7l1.4 1.4M2 12h2M20 12h2M4.9 19.1l1.4-1.4M17.7 6.3l1.4-1.4"/></svg>
+<svg class="icon-moon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M21 12.8A9 9 0 1 1 11.2 3 7 7 0 0 0 21 12.8Z"/></svg>
+</button>
+</div>
+{{if .AuthEnabled}}<form class="session-row" method="post" action="/logout">
+<span class="session-user" title="{{.User}}">{{.User}}</span>
+<button type="submit" class="btn btn-ghost btn-sm">Выйти</button>
+</form>{{end}}
+</div>
+
+<nav class="nav-groups" aria-label="Разделы">
+<div class="nav-group-title">Мониторинг</div>
 <a class="nav-link{{if eq .ActiveNav "overview"}} active{{end}}" {{if eq .ActiveNav "overview"}}aria-current="page"{{end}} href="/overview">
 <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="3" y="3" width="7" height="9" rx="1.5"/><rect x="14" y="3" width="7" height="5" rx="1.5"/><rect x="14" y="12" width="7" height="9" rx="1.5"/><rect x="3" y="16" width="7" height="5" rx="1.5"/></svg>
 Обзор
@@ -56,6 +71,11 @@
 <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M4 19.5A2.5 2.5 0 0 1 6.5 17H20"/><path d="M6.5 2H20v20H6.5A2.5 2.5 0 0 1 4 19.5v-15A2.5 2.5 0 0 1 6.5 2Z"/></svg>
 Реестр
 </a>
+<a class="nav-link{{if eq .ActiveNav "analytics"}} active{{end}}" {{if eq .ActiveNav "analytics"}}aria-current="page"{{end}} href="/analytics">
+<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M4 20V10M10 20V4M16 20v-7M22 20H2"/></svg>
+Аналитика
+</a>
+<div class="nav-group-title">Настройка</div>
 <a class="nav-link{{if eq .ActiveNav "validators"}} active{{end}}" {{if eq .ActiveNav "validators"}}aria-current="page"{{end}} href="/validators">
 <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="4" y="3" width="16" height="7" rx="1.5"/><rect x="4" y="14" width="16" height="7" rx="1.5"/><circle cx="8" cy="6.5" r="1"/><circle cx="8" cy="17.5" r="1"/></svg>
 Валидаторы
@@ -78,20 +98,6 @@
 </a>
 </nav>
 
-{{if .AuthEnabled}}
-<form class="sidebar-user" method="post" action="/logout">
-<span class="sidebar-user-name" title="{{.User}}">{{.User}}</span>
-<button type="submit" class="btn btn-ghost btn-sm">Выйти</button>
-</form>
-{{end}}
-
-<div class="sidebar-foot">
-<span class="sidebar-foot-status"><span class="pulse-dot"></span>control-api</span>
-<button type="button" class="theme-toggle" id="themeToggle" aria-label="Переключить тему" title="Переключить тему">
-<svg class="icon-sun" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><circle cx="12" cy="12" r="4"/><path d="M12 2v2M12 20v2M4.9 4.9l1.4 1.4M17.7 17.7l1.4 1.4M2 12h2M20 12h2M4.9 19.1l1.4-1.4M17.7 6.3l1.4-1.4"/></svg>
-<svg class="icon-moon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M21 12.8A9 9 0 1 1 11.2 3 7 7 0 0 0 21 12.8Z"/></svg>
-</button>
-</div>
 </aside>
 <script>
 (function () {