Add records, Elijah scores, per-session notes, and PWA update prompt

App features:
- Personal-best records per metric: manually settable in Settings and
  auto-updated when a session beats them; shown in the log modal and a
  new dashboard "Personal records" card.
- Juggling now counts by 1 instead of 5.
- 1-on-1 with Elijah gains Technical Skill and Effort scores (out of 10)
  as manual inputs, plus an optional per-session note.
- Service worker now uses a controlled update flow: an in-app
  "new version ready" banner activates the update on tap and reloads.

Data model:
- category_metrics gains track_record + record; entries gains note.
- Idempotent migrations bring existing databases up to date (juggling
  step/record, Elijah score metrics) alongside the updated seed.

StartOS package:
- Bump to 0.1.2:0 with release notes.
- Build x86_64 only (drop aarch64) per deployment target.

public/sw.js

@@ -1,4 +1,4 @@
-const CACHE = 'premier-gunner-v1';
+const CACHE = 'premier-gunner-v3';
 const SHELL = [
   '/', '/index.html', '/login.html',
   '/css/styles.css',
@@ -10,7 +10,10 @@ const SHELL = [
 ];
 
 self.addEventListener('install', (e) => {
-  e.waitUntil(caches.open(CACHE).then((c) => c.addAll(SHELL)).then(() => self.skipWaiting()));
+  // Pre-cache the new shell, but do NOT skipWaiting automatically — we wait
+  // until the page tells us to (via the "Refresh" banner) so the update is
+  // controlled and the user is never interrupted mid-action.
+  e.waitUntil(caches.open(CACHE).then((c) => c.addAll(SHELL)));
 });
 
 self.addEventListener('activate', (e) => {
@@ -20,6 +23,11 @@ self.addEventListener('activate', (e) => {
   );
 });
 
+// The page posts this when the user taps "Refresh" on the update banner.
+self.addEventListener('message', (e) => {
+  if (e.data && e.data.type === 'SKIP_WAITING') self.skipWaiting();
+});
+
 self.addEventListener('fetch', (e) => {
   const url = new URL(e.request.url);
   if (e.request.method !== 'GET') return;