Release v2026.3.0

What's Changed

• switched the workflow to run on release branch push by @ethankonk in #9
• standardizing client version headers by @ethankonk in #10
• chore: release sdk-types, version and changelog generation by @ethankonk in #12
• chore (again): release by @ethankonk in #13
• fixed bug in workflow by @ethankonk in #14
• fixed another bug in workflow by @ethankonk in #15
• fixed another bug in workflow by @ethankonk in #16

Full Changelog: v2026.1.0...v2026.3.0