Add compatibility notes for OpenAI package versions in README and getting started guide

Author: AnatoliB

docs/openai_agents/README.md

@@ -17,4 +17,6 @@ The Durable OpenAI Agents integration combines the familiar OpenAI Agents SDK wi
 ## Documentation
 
 - [Getting Started](getting-started.md) - Setup and your first durable agent
-- [Reference](reference.md) - Complete reference documentation
+- [Reference](reference.md) - Complete reference documentation
+
+> Compatibility note: The Durable OpenAI Agents integration has been validated with the OpenAI packages pinned in the sample application's `samples-v2/openai_agents/requirements.txt` (currently `openai==1.107.3` and `openai-agents==0.3.0`). Because the OpenAI packages release frequently and may introduce breaking API or behavioral changes, we recommend pinning to those versions if you face unexpected issues before reporting a bug.

docs/openai_agents/getting-started.md

@@ -56,6 +56,8 @@ Then install them:
 pip install -r requirements.txt
 ```
 
+> Compatibility note: This integration has been tested with the exact OpenAI package versions defined in the sample app at `samples-v2/openai_agents/requirements.txt` (currently `openai==1.107.3` and `openai-agents==0.3.0`). The OpenAI ecosystem evolves quickly and newer releases may introduce breaking changes. If you encounter unexpected errors, try pinning to those specific versions first to verify whether the issue is due to a version mismatch before filing an issue.
+
 ### Configuring Durable Task Scheduler Backend
 
 **Durable Task Scheduler is the preferred backend** for this integration as it provides enhanced performance, better observability, and simplified local development. While not a hard requirement, it's strongly recommended for production workloads.