What this PR does / why we need it:

The FIPS import-order test exceeded its 60-second subprocess deadline in the Python 3.11/macOS unit-test job for #6188. Give the fresh Feast import 180 seconds to complete under CI load while preserving the FIPS and import-order assertions.

Schedule a faulthandler stack dump after 120 seconds and include captured stdout/stderr in timeout failures. This provides evidence of where a future slow or stalled import is spending time. Handle missing output and decode captured bytes with replacement for invalid characters.

Linux CI also fails before tests because --torch-backend cpu selects CPU wheels whose hashes are absent from the existing locks. Add the published CPU wheel hashes for the pinned torch and torchvision versions to all three CI lockfiles, retaining the existing versions and PyPI hashes. These hashes were generated with uv pip compile --no-deps --torch-backend cpu --universal --generate-hashes for the existing pins. The broader lock-generation changes are tracked in #6825.

Which issue(s) this PR fixes:

Mitigates the timeout observed in this CI job. The original log does not identify the stalled import, so the longer deadline is a mitigation rather than proof of the underlying cause.

Checks

• I've made sure CI is passing: all 20 active checks passed on cda845de7, including all five Python unit-test configurations, both lint jobs, and smoke tests. Five unrelated checks were skipped.
• My commits are signed off (git commit -s)
• My PR title follows conventional commits format

Testing Strategy

• Unit tests: all 10 tests in sdk/python/tests/unit/test_offline_server.py passed locally on macOS with Python 3.12.
• Manual tests: forced a real subprocess to stall with shortened diagnostic/deadline timers; verified the failure includes stdout and the faulthandler stack dump. Also verified a timeout without captured output.
• Dependency validation: reproduced the original torchvision hash mismatch with CI's uv 0.12.13, then successfully installed both CPU wheels from the updated lock entries targeting Linux x86_64 for Python 3.10, 3.11, and 3.12. Verified that package versions, original hashes, and all non-PyTorch entries remain unchanged.
• Integration tests
• Testing is not required for this change

Ruff lint and formatting checks passed for the changed file. Scoped mypy (--follow-imports=silent tests/unit/test_offline_server.py) also passed.