[Bug]: hints clobber stderr/out on bazel error

### What happened?

The use of the `hints` feature captures+buffers+analyzes stderr/out, then does not handle errors gracefully. It seems stderr/out is missing when `bazel test` fails?

### Version

USE_BAZEL_VERSION=aspect/2026.7.4

### How to reproduce

1. Configure hints in the cli config.yaml.
2. `bazel test //...` which includes failing tests
3. `bazel run ...` of the failed test seems to not reproduce it?

### Any other information?

_No response_

Start by reproducing the issue with the hints feature enabled, then run `bazel test //...` with a failing test and compare its stderr/stdout with `bazel run ...` for the failed test. Trace the hints capture, buffering, analysis, and error-handling path; done means the original stderr/stdout remains available when `bazel test` fails.

Written by the indexing model from the issue text.