v0.5.3

Automated stable release of @polderlabs/openkan@0.5.3.

Commit: 2feeddd

What's Changed

• fix(kanban): harden atomic write and session archive against Windows EPERM by @CertifiedVibeCoder in #3
• chore(release): graduate beta to main by @CertifiedVibeCoder in #4

Full Changelog: v0.5.2...v0.5.3