chore: reconcile contribution rules and onboarding fixtures

Extract the guided setup test fixture without dropping cases. Supply current settings/discovery contracts and Opus 5.5 in the isolated Storybook boundary.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

packages/adapter-utils/src/types.ts

@@ -725,7 +725,6 @@ export interface CLIAdapterModule {
 
 export interface CreateConfigValues {
   runner?: "auto" | "paperclip" | "legacy";
-  /** Transient form resolution; never an execution setting or API override. */
   resolvedRunner?: "paperclip" | "legacy";
   adapterType: string;
   codexPermissionMode?: "never" | "on-request" | "untrusted";