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/handlers_registry.go

@@ -2,7 +2,9 @@ package dashboard
 
 import (
 	"net/http"
+	"net/netip"
 	"net/url"
+	"strconv"
 	"strings"
 )
 
@@ -11,6 +13,8 @@ type registryPageData struct {
 	Items          []registryItem
 	Query          string
 	StatusFilter   string
+	Run            int64 // drill-down from the analytics page
+	Subnet         string
 	Page, PerPage  int
 	Total          int
 	Pager          pagerData
@@ -37,7 +41,15 @@ func (s *Server) handleRegistryPage(w http.ResponseWriter, r *http.Request) {
 	}
 	perPage := parsePerPage(r.URL.Query().Get("per_page"))
 	page := parsePage(r.URL.Query().Get("page"))
-	query := registryQuery{Q: q, LastResult: status, Limit: perPage, Offset: (page - 1) * perPage}
+	run, _ := strconv.ParseInt(r.URL.Query().Get("run"), 10, 64)
+	if run < 0 {
+		run = 0
+	}
+	subnet := strings.TrimSpace(r.URL.Query().Get("subnet"))
+	if _, err := netip.ParsePrefix(subnet); err != nil {
+		subnet = ""
+	}
+	query := registryQuery{Q: q, LastResult: status, Run: run, Subnet: subnet, Limit: perPage, Offset: (page - 1) * perPage}
 
 	res, err := s.CA.ListRegistryPage(r.Context(), query)
 	if err == nil {
@@ -54,7 +66,15 @@ func (s *Server) handleRegistryPage(w http.ResponseWriter, r *http.Request) {
 	if status != "" {
 		params.Set("status", status)
 	}
+	if run > 0 {
+		params.Set("run", strconv.FormatInt(run, 10))
+	}
+	if subnet != "" {
+		params.Set("subnet", subnet)
+	}
 	data := registryPageData{
+		Run:            run,
+		Subnet:         subnet,
 		Items:          res.Items,
 		Query:          q,
 		StatusFilter:   status,