chore: prepare release 20260818.09

Generate release notes for the OpenAI Responses routing fix. Extend the fixed-change parser to recognize Preserve-prefixed merge commits so the generated notes do not silently omit this release's only behavioral change.

Author: penso

CHANGELOG.md

@@ -19,6 +19,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Security
 
+## [20260818.09] - 2026-08-18
+### Fixed
+- Preserve Responses routing for explicit OpenAI endpoints (#1212)
+
 ## [20260818.08] - 2026-08-18
 ### Fixed
 - [gateway] Keep core service methods within size limit

cliff.toml

@@ -41,7 +41,7 @@ commit_parsers = [
   { group = "<!-- 1 -->Changed", message = "^revert(\\([^)]+\\))?!?:" },
   { group = "<!-- 2 -->Deprecated", message = "(?i)^.*deprecat.*$" },
   { group = "<!-- 3 -->Removed", message = "(?i)^.*(remove|delete|drop).*$" },
-  { group = "<!-- 4 -->Fixed", message = "^(Avoid|Correct|Fix|Harden|Prevent|Repair|Resolve|Stabilize)\\b" },
+  { group = "<!-- 4 -->Fixed", message = "^(Avoid|Correct|Fix|Harden|Prevent|Preserve|Repair|Resolve|Stabilize)\\b" },
   { group = "<!-- 4 -->Fixed", message = "^fix(\\([^)]+\\))?!?:" },
   { group = "<!-- 5 -->Security", message = "(?i)^.*security.*$" },
   { message = "^build(\\([^)]+\\))?!?:", skip = true },