docs: [LangGraph Server Changelog Bot] Changelog updates for new version(s) (#3018)

Automated changelog update created by the LangGraph Server Changelog
Bot.

Feel free to merge anytime.

Author: samecrowder

src/langsmith/agent-server-changelog.mdx

@@ -11,6 +11,16 @@ rss: true
 
 [Agent Server](/langsmith/agent-server) is an API platform for creating and managing agent-based applications. It provides built-in persistence, a task queue, and supports deploying, configuring, and running assistants (agentic workflows) at scale. This changelog documents all notable updates, features, and fixes to Agent Server releases.
 
+<Update label="2026-03-10" tags={["agent-server"]}>
+## v0.7.68
+
+- Fixed issues with non-DR checkpoint AES JSON to improve functionality and extend test coverage.
+- Fixed A2A streaming to correctly emit interrupt artifacts as separate `artifact-update` events according to the specification.
+- Ensured secure tarfile extraction by only extracting validated and safe members to prevent arbitrary file write vulnerabilities.
+- Enhanced security by requiring an exact match for the `noauth` path in authentication middleware.
+- Fixed stale checkpoint values being written to thread state during rollback in multitasking strategy.
+</Update>
+
 <Update label="2026-03-06" tags={["agent-server"]}>
 ## v0.7.66