feat: initial Speedboard implementation

sitespeed.io web UI with Express/Pug/SQLite — port 3132.
Includes job queue, SSE live log, full metrics dashboard,
site history, CO2/axe/CWV sections, and Docker support.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

views/results.pug

@@ -0,0 +1,34 @@
+extends layout
+
+block content
+  div(class='space-y-6')
+    //- Header
+    div(class='flex flex-wrap items-start justify-between gap-4')
+      div
+        h1(class='text-2xl font-bold break-all')= job.url
+        p(class='text-xs text-gray-400 mt-1')
+          | Tested #{new Date(job.finished_at).toLocaleString()} •
+          | #{job.browser} • #{job.mobile ? 'Mobile' : 'Desktop'} • #{job.runs} run(s)
+      div(class='flex gap-2 flex-wrap')
+        a(href=`/?url=${encodeURIComponent(job.url)}` class='text-sm bg-indigo-600 text-white px-4 py-1.5 rounded hover:bg-indigo-700') Retest
+        a(href=`/site?url=${encodeURIComponent(job.url)}` class='text-sm bg-gray-200 text-gray-700 px-4 py-1.5 rounded hover:bg-gray-300') Site History
+        if reportUrl
+          a(href=reportUrl target='_blank' class='text-sm bg-green-600 text-white px-4 py-1.5 rounded hover:bg-green-700') Full Report ↗
+
+    //- Coach Scores
+    include partials/scorecard
+
+    //- Core Web Vitals
+    include partials/cwv
+
+    //- Navigation Timings
+    include partials/timings
+
+    //- Resources
+    include partials/resources
+
+    //- Accessibility
+    include partials/axe
+
+    //- CO2
+    include partials/co2