Add defensive checks to RSS/sitemap generation

Prevents crashes when malformed claim entries exist:
- Skip undefined or incomplete claim objects
- Log warnings for debugging
- Allow build to continue despite data issues

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

scripts/generate-rss.ts

@@ -36,6 +36,12 @@ function generateRssFeed(): string {
 
   // Add all claims pages automatically (sorted by date, newest first)
   SORTED_CLAIMS.forEach((claim) => {
+    // Skip undefined or malformed entries
+    if (!claim || !claim.claims || !claim.title || !claim.slug) {
+      console.warn('Skipping malformed claim entry:', claim);
+      return;
+    }
+
     const description = `${claim.claims.length} atomic claims about ${claim.description.toLowerCase()}.`;
 
     xml += `

scripts/generate-sitemap.ts

@@ -36,6 +36,12 @@ function generateSitemap(): string {
 
   // Add all claims pages automatically
   ALL_CLAIMS_DATA.forEach((claim) => {
+    // Skip undefined or malformed entries
+    if (!claim || !claim.slug || !claim.date) {
+      console.warn('Skipping malformed claim entry in sitemap:', claim);
+      return;
+    }
+
     xml += `  <url>
     <loc>${baseUrl}/claims-library/${claim.slug}</loc>
     <lastmod>${formatDate(claim.date)}</lastmod>