fix: scanner ignoriert metadaten-links (gmpg.org rel=profile); version 1.2.0

- Nur ladende <link rel=...> (stylesheet/preload/icon/...) werden gezaehlt;
  rel=profile/canonical/pingback etc. (z.B. gmpg.org) sind keine Requests mehr.
- Plugin-Version + Header auf 1.2.0 (passend zu readme), Changelog-Eintrag.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

license-backend/test/scan.test.mjs

@@ -8,6 +8,8 @@ const ok = (name, cond, extra = '') => {
 
 const html = `
 <!DOCTYPE html><html><head>
+  <link rel="profile" href="https://gmpg.org/xfn/11">
+  <link rel="canonical" href="https://other.example/x">
   <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto">
   <script src="/wp-includes/js/jquery.js"></script>
   <script src="https://www.googletagmanager.com/gtag/js?id=G-XYZ"></script>
@@ -31,6 +33,8 @@ ok('finds external script (gtm)', resources.some((r) => r.type === 'script' && r
 ok('resolves relative script to absolute', resources.some((r) => r.url === 'https://example.com/wp-includes/js/jquery.js'));
 ok('finds external img', resources.some((r) => r.type === 'img' && r.url.includes('cdn.example.com')));
 ok('finds link stylesheet', resources.some((r) => r.type === 'link' && r.url.includes('fonts.googleapis.com')));
+ok('ignores rel=profile (gmpg.org)', !resources.some((r) => r.url.includes('gmpg.org')));
+ok('ignores rel=canonical', !resources.some((r) => r.url.includes('other.example')));
 ok('finds object data (vimeo)', resources.some((r) => r.type === 'object' && r.url.includes('player.vimeo.com')));
 ok('ignores anchor href', !resources.some((r) => r.url.includes('twitter.com')));