add v0.67 release highlights #246

Author: theekrystallee

networks/release-notes/services.md

@@ -16,6 +16,30 @@ Visit the [Hedera status page](https://status.hedera.com/) for the latest versio
 **TESTNET UPDATE: OCTOBER 22, 2025**
 {% endhint %}
 
+### Release Highlights
+
+Release v0.67 enhances the stability and performance of the Hiero Consensus Node and updates. Continued progress was made on HIP-1081 Block Nodes, adding features to improve connectivity and metrics.
+
+<details>
+
+<summary><strong>What's new in Release 0.67?</strong></summary>
+
+**Updates:**
+
+* **Improved Block Streaming Metrics**: Metrics for communication between consensus and block nodes have been reworked for clarity and utility. Metric names no longer include the self-node ID, as this is now automatically added as a label
+
+- **Block Streaming Service Lifecycle**: The startup and shutdown procedures for the \`BlockBufferService\` and \`BlockNodeConnectionManager\` have been improved to ensure more reliable initialization and termination.
+- **Enhanced Testing and CI**: A large effort was invested in improving the test infrastructure, including adding test container support for block nodes, increasing test coverage for block node communication, and parallelizing test suite runs to accelerate the development cycle.
+- **Besu Upgrade**: Upgraded Besu EVM to `25.2.2`. The update introduces Besu Native Libraries Verification, which ensures that required native libraries are available on the host operating system. When these libraries are missing, Besu falls back to non-native implementations, which can reduce performance. This verification helps maintain optimal execution efficiency and consistency across nodes.
+
+**Summary:**
+
+Steady strides were also made in Block Node stability and manageability, including optimizations for error handling, and operational monitoring. The new Besu upgrade brings EVM to `v.25.2.2` with Besu Native Libraries Verification enhancements.
+
+For developers, no breaking changes or immediate actions required. Existing contracts and integrations remain fully compatible.
+
+</details>
+
 ### [**Build 0.67.1**](https://github.com/hiero-ledger/hiero-consensus-node/releases/tag/v0.67.1)
 
 <details>