v1.20251219.0

What's Changed

• Fix JSRPC Return event timing to fire when handler returns by @danlapid in https://github.com/cloudflare/workerd/pull/5721
• [build] 12-17-25 Update bzlmod deps by @fhanau in https://github.com/cloudflare/workerd/pull/5722
• deflake container tests by @anonrig in https://github.com/cloudflare/workerd/pull/5720
• Fix Body::text() and Body::json() to handle BOMs by @anonrig in https://github.com/cloudflare/workerd/pull/5621
• handle different builtin types in rust jsg registry by @anonrig in https://github.com/cloudflare/workerd/pull/5719
• Suppress WorkerTracer warning for duplicate alarm requests by @mar-cf in https://github.com/cloudflare/workerd/pull/5685

Full Changelog: https://github.com/cloudflare/workerd/compare/v1.20251218.0...v1.20251219.0