Bump pinned conductor-oss e2e server version to 3.32.0-rc18 (#454)

Co-authored-by: Kowser <kowser.orkes@gmail.com>
Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>

Author: 3 people

.github/workflows/agent-e2e.yml

@@ -20,7 +20,7 @@ concurrency:
   cancel-in-progress: true
 
 env:
-  CONDUCTOR_SERVER_VERSION: "3.32.0-rc.8"   # pinned server release — bump deliberately
+  CONDUCTOR_SERVER_VERSION: "3.32.0-rc18"   # pinned server release — bump deliberately
 
 jobs:
   agent-e2e: