P1B: Refactor (packages/opencode/src/session/retry.ts:44): Function with high complexity (count = 22): delay

### Uniqueness check

- [x] I have searched open issues and confirmed this **file + smell** is not already taken.

### Full path to the Typescript file

packages/opencode/src/session/retry.ts

### Function(s)/scope targeted

delay()

### Relevant Qlty output

```shell
packages/opencode/src/session/retry.ts
  44  Function with high complexity (count = 22): delay
```