v1.20250821.0

What's Changed

• Fixes Python SDK test to use the new default entrypoint correctly. by @dom96 in https://github.com/cloudflare/workerd/pull/4817
• Python: Improvements to upload_bundles.py script by @hoodmane in https://github.com/cloudflare/workerd/pull/4837
• Python: Make release-python-runtime push changes to python_metadata.bzl to branch by @hoodmane in https://github.com/cloudflare/workerd/pull/4838
• release-python-runtime: Don't update released bundles by default by @hoodmane in https://github.com/cloudflare/workerd/pull/4839
• Fix double write of entry_size by @danlapid in https://github.com/cloudflare/workerd/pull/4840
• Always grab the owned source from a dynamic source by @jasnell in https://github.com/cloudflare/workerd/pull/4844
• Improve tracing for MemoryCache by @danlapid in https://github.com/cloudflare/workerd/pull/4843
• release-python-runtime.yml: Make the commit a fixup commit by @hoodmane in https://github.com/cloudflare/workerd/pull/4842
• Fixup for VFS file clone handling by @jasnell in https://github.com/cloudflare/workerd/pull/4845
• Replace deprecated capnp set/add methods with setPtr/addPtr/addPtrPtr by @jasnell in https://github.com/cloudflare/workerd/pull/4822
• Add getJurisdiction method to DurableObjectId by @joshthoward in https://github.com/cloudflare/workerd/pull/4789

Full Changelog: https://github.com/cloudflare/workerd/compare/v1.20250820.0...v1.20250821.0