docs: [LangGraph Server Changelog Bot] Changelog updates for new version(s) (#1263)

Automated changelog update created by the LangGraph Server Changelog
Bot.

Feel free to merge anytime.

Author: samecrowder

src/langsmith/langgraph-server-changelog.mdx

@@ -5,6 +5,15 @@ sidebarTitle: LangGraph Server changelog
 
 [LangGraph Server](/langsmith/langgraph-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 LangGraph Server releases.
 
+<a id="2025-11-03"></a>
+## v0.5.2
+- Added retry logic for PostgreSQL connections during startup to enhance deployment reliability and improved error logging for easier debugging.
+
+<a id="2025-11-03"></a>
+## v0.5.1
+- Resolved an issue where persistence was not functioning correctly with LangChain.js's createAgent feature.
+- Optimized assistants CRUD performance by improving database connection pooling and gRPC client reuse, reducing latency for large payloads.
+
 <a id="2025-10-31"></a>
 ## v0.5.0
 - Updated dependency requirements to support the latest security patch, removed JSON fallback for serialization, and adjusted deserialization behavior for enhanced security.