docs: [LangGraph Server Changelog Bot] Changelog updates for new version(s) (#1735)

Automated changelog update created by the LangGraph Server Changelog
Bot.

Feel free to merge anytime.

Author: samecrowder

src/langsmith/agent-server-changelog.mdx

@@ -5,6 +5,12 @@ sidebarTitle: Agent Server changelog
 
 [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.
 
+<a id="2025-12-04"></a>
+## v0.5.28
+- Introduced a faster, Rust-based implementation of uuid7 to improve performance, now used in langsmith and langchain-core.
+- Added support for `$or` and `$and` in PostgreSQL auth filters to enable complex logic in authentication checks.
+- Capped psycopg and psycopg-pool versions to prevent infinite waiting on startup.
+
 <a id="2025-11-26"></a>
 ## v0.5.27
 - Ensured `runs.list` with filters returns only run fields, preventing incorrect status data from being included.