[BUG] Kotlin generator not generating compilable code, enum import issue

Bug Report Checklist

• I have validated the input using an validator
• I have tested with the latest master to confirm the issue still exists.
• I have searched for related issues/PRs.

Description

The kotlin generator and the generated code will not compile as imports for enum are missing.

openapi-generator version

v7.10.0, also tried latest (as of 2025/01/10).

OpenAPI declaration file content or url

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Steps to reproduce

• Run generator

openapi-generator \
    generate \
    --package-name com.name.generated \
    -i https://.../...-swagger.json \
    --global-property models,modelDocs=false,modelTests=false,apis,apiDocs=false,apiTests=false,supportingFiles \
    -g kotlin \
    -o .

• Try and compile code.
• Several files will not compile, e.g: CancelPoliciesApi.kt line 156 COMPACT enum has not been imported.
• If I go through each file with issues and add the import for the enum by hand the issue is resolved.

Start with the Kotlin generator by reproducing the issue using the provided openapi-generator command, then inspect the generated CancelPoliciesApi.kt around line 156 and its referenced enum. Done means the generated Kotlin files include the required enum imports and compile without manual edits.