Quarantine or fix test_utah hang and other known-broken tests on master

Summary

Several test failures are known-broken on main across repos but are neither fixed nor quarantined. Every PR body ends up noting "these failures predate this PR" instead of the suite being green. This makes real regressions harder to spot.

What goes wrong

policyengine-api

• tests/to_refactor/python/test_us_policy_macro.py::test_utah hangs locally; module references policyengine_api/worker.py that no longer exists. Confirmed on master by multiple agents.

policyengine-api-v2 (simulation project)

• tests/test_household_calculation.py — macOS-only Blosc2 import failures.
• tests/test_agent.py — AskRequest ImportError.

policyengine-app-v2

• 40 failures in app/src/tests/unit/libs/migration/* from localStorage.clear is not a function.

Suggested fix

Per repo, either:

1. Fix the underlying issue (preferred), or
2. Quarantine with an explicit marker so the default suite is green:

# pytest
@pytest.mark.skip(reason="Broken on main — tracked in #NNNN, fix pending")
def test_utah(): ...

# vitest
it.skip('migration test — localStorage.clear not a function, tracked in #NNNN', ...)

3. Surface via a separate CI job (pytest -m broken) that's allowed to fail, so the status is visible without masking real regressions.

The anti-pattern to eliminate: PR authors noting "these failures predate this PR" in every review. If they predate every PR, they should be marked so CI reflects that.

Severity

Medium (dev-experience). Hides real regressions, creates review friction, breaks the "CI green = merge" invariant.

Scope

Filing this in three repos: policyengine-api, policyengine-api-v2, policyengine-app-v2.

Start with tests/to_refactor/python/test_us_policy_macro.py::test_utah in policyengine-api, then inspect the named test files in policyengine-api-v2 and app/src/tests/unit/libs/migration in policyengine-app-v2. Run the affected pytest and Vitest tests to confirm the failures. Done means the underlying failures are fixed or explicitly quarantined, while the default suites are green and broken tests remain visible separately.