fix(seo): add endDate, performer, offers to Event structured data

Clears the 3 non-critical Events issues in Search Console
("Missing field endDate/performer/offers") across all /projects/
recap pages. These are free, single-day events, so endDate mirrors
startDate, performer is MSOS (host org), and offers is a zero-price
Offer. Generated centrally in tools/seo_inject.py and re-injected.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

si/projects/kafanska-vecher-2025/index.html

@@ -21,7 +21,7 @@
       gtag('js', new Date());
       gtag('config', 'G-WVYV807VSS');
     </script>
-    <script src="/consent.js?v=f95de694" defer></script>
+    <script src="/consent.js" defer></script>
     <meta name="description" content="Približno 200 srbskih in makedonskih študentov je napolnilo kavarno AULA ob večeru žive glasbe, skupnih miz in formata, ki ga je MSOS želel preizkusiti.">
     <link rel="canonical" href="https://msosorg.com/si/projects/kafanska-vecher-2025/">
     <link rel="alternate" hreflang="en" href="https://msosorg.com/en/projects/kafanska-vecher-2025/">
@@ -44,7 +44,7 @@
     <script type="application/ld+json">{"@context":"https://schema.org","@type":"NGO","name":"Makedonska študentska organizacija v Sloveniji","alternateName":["MSOS","Macedonian Students Organization Slovenia","Macedonian Student Organisation in Slovenia","Македонска студентска организација во Словенија","Makedonska študentska organizacija v Sloveniji"],"description":"Prva uradna makedonska študentska organizacija v Sloveniji — podpora, dogodki, skupnost in glas makedonskih študentov od prijave do diplome.","url":"https://msosorg.com/si/","logo":"https://msosorg.com/images/1-logo.png","email":"info@msosorg.com","address":{"@type":"PostalAddress","streetAddress":"Masarykova cesta 24","postalCode":"1000","addressLocality":"Ljubljana","addressCountry":"SI"},"areaServed":{"@type":"Country","name":"Slovenia"},"knowsLanguage":["mk","sl","en"],"sameAs":["https://www.facebook.com/msos.org","https://www.instagram.com/msosorg_com","https://www.linkedin.com/company/msos-org","https://www.youtube.com/@msosorg"],"foundingDate":"2023-03-05"}</script>
     <script type="application/ld+json">{"@context":"https://schema.org","@type":"Article","headline":"Kafanska večer","description":"Približno 200 srbskih in makedonskih študentov je napolnilo kavarno AULA ob večeru žive glasbe, skupnih miz in formata, ki ga je MSOS želel preizkusiti.","image":"https://msosorg.com/images/kafanska-2025-hero-1.webp","inLanguage":"sl","author":{"@type":"Organization","name":"Makedonska študentska organizacija v Sloveniji","url":"https://msosorg.com/si/"},"publisher":{"@type":"Organization","name":"Makedonska študentska organizacija v Sloveniji","logo":{"@type":"ImageObject","url":"https://msosorg.com/images/1-logo.png"}},"mainEntityOfPage":"https://msosorg.com/si/projects/kafanska-vecher-2025/","datePublished":"2025-05-15","dateModified":"2025-05-15"}</script>
     <script type="application/ld+json">{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Domov","item":"https://msosorg.com/si/"},{"@type":"ListItem","position":2,"name":"Dogodki in projekti","item":"https://msosorg.com/si/projects/"},{"@type":"ListItem","position":3,"name":"Kafanska večer","item":"https://msosorg.com/si/projects/kafanska-vecher-2025/"}]}</script>
-    <script type="application/ld+json">{"@context":"https://schema.org","@type":"Event","name":"Kafanska večer","startDate":"2025-05-15","eventStatus":"https://schema.org/EventScheduled","eventAttendanceMode":"https://schema.org/OfflineEventAttendanceMode","location":{"@type":"Place","name":"Ljubljana","address":{"@type":"PostalAddress","addressCountry":"SI","addressLocality":"Ljubljana"}},"image":"https://msosorg.com/images/kafanska-2025-hero-1.webp","inLanguage":"sl","organizer":{"@type":"Organization","name":"Makedonska študentska organizacija v Sloveniji","url":"https://msosorg.com/si/"},"url":"https://msosorg.com/si/projects/kafanska-vecher-2025/","description":"Približno 200 srbskih in makedonskih študentov je napolnilo kavarno AULA ob večeru žive glasbe, skupnih miz in formata, ki ga je MSOS želel preizkusiti."}</script>
+    <script type="application/ld+json">{"@context":"https://schema.org","@type":"Event","name":"Kafanska večer","startDate":"2025-05-15","endDate":"2025-05-15","eventStatus":"https://schema.org/EventScheduled","eventAttendanceMode":"https://schema.org/OfflineEventAttendanceMode","location":{"@type":"Place","name":"Ljubljana","address":{"@type":"PostalAddress","addressCountry":"SI","addressLocality":"Ljubljana"}},"image":"https://msosorg.com/images/kafanska-2025-hero-1.webp","inLanguage":"sl","organizer":{"@type":"Organization","name":"Makedonska študentska organizacija v Sloveniji","url":"https://msosorg.com/si/"},"performer":{"@type":"Organization","name":"Makedonska študentska organizacija v Sloveniji","url":"https://msosorg.com/si/"},"offers":{"@type":"Offer","price":"0","priceCurrency":"EUR","availability":"https://schema.org/InStock","url":"https://msosorg.com/si/projects/kafanska-vecher-2025/","validFrom":"2025-05-15"},"url":"https://msosorg.com/si/projects/kafanska-vecher-2025/","description":"Približno 200 srbskih in makedonskih študentov je napolnilo kavarno AULA ob večeru žive glasbe, skupnih miz in formata, ki ga je MSOS želel preizkusiti."}</script>
     <link rel="icon" type="image/png" href="/favicon-96x96.png" sizes="96x96">
     <link rel="icon" type="image/svg+xml" href="/favicon.svg">
     <link rel="shortcut icon" href="/favicon.ico">