v1.20250827.0

What's Changed

• Revert "Python: Mark 0.28.2 compat date not experimental (#4865)" by @hoodmane in https://github.com/cloudflare/workerd/pull/4898
• Python: Move the static methods defined on Response to FetchResponse by @hoodmane in https://github.com/cloudflare/workerd/pull/4885
• Replace jsg::alloc uses with js.alloc by @jasnell in https://github.com/cloudflare/workerd/pull/4897
• EW-9282 EW-9451 Fix missing onset event for JSRpc edge cases, add JSRpc regression test by @fhanau in https://github.com/cloudflare/workerd/pull/4881
• Remove experimental flag from node:fs and node:os modules by @jasnell in https://github.com/cloudflare/workerd/pull/4903
• do not throw an error on insecureHTTPParser option by @anonrig in https://github.com/cloudflare/workerd/pull/4906
• EW-9366 [o11y] Implement proper timestamp support for STW by @fhanau in https://github.com/cloudflare/workerd/pull/4767
• fix node:http header duplication by @anonrig in https://github.com/cloudflare/workerd/pull/4905
• fix Buffer.isBuffer returning true for true by @anonrig in https://github.com/cloudflare/workerd/pull/4910
• EW-9367 [o11y] Implement proper event size limits for streaming tail worker by @fhanau in https://github.com/cloudflare/workerd/pull/4832
• Simplify tryResolveMainModule to use js.resolveModule by @jasnell in https://github.com/cloudflare/workerd/pull/4848
• Ensure that the isolate always has a capnp schema loader associated with it by @jasnell in https://github.com/cloudflare/workerd/pull/4855

Full Changelog: https://github.com/cloudflare/workerd/compare/v1.20250826.0...v1.20250827.0