chore: prepare release 20260818.10

Publish a fresh release after the 20260818.09 OpenAI integration check exhausted provider credits. Include the GPT-5.6 routing coverage and Apple Container fixes merged since that tag.

Author: penso

CHANGELOG.md

@@ -19,6 +19,15 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Security
 
+## [20260818.10] - 2026-08-18
+### Added
+- Add GPT-5.6 Luna routing coverage (#1213)
+
+
+### Fixed
+- Fix Apple Container status parsing across versions (#1214)
+- Fix Apple Container sandbox resource limits (#1215)
+
 ## [20260818.09] - 2026-08-18
 ### Fixed
 - Preserve Responses routing for explicit OpenAI endpoints (#1212)