Astro 5.15

Astro 5.15 introduces automatic skew protection for Netlify deployments to prevent version mismatches between client and server during deployments. The release adds new adapter APIs that allow hosting platforms to customize fetch headers and asset query parameters, enabling Vercel to also implement reliable skew protection. Font preloading now supports granular filtering by weight, style, and subset for better performance optimization. Additional improvements include a copy button for stack traces in the error overlay and automatic wrangler.jsonc scaffolding for Cloudflare integration.