[hua7450]

What and why

policyengine_us/tests/core/test_trustees_2026_economic_assumptions.py::test_the_tree_has_the_expected_readers fails on main, so it fails on any PR whose CI runs against current main.

Two PRs that each passed on their own combined to break it:

• PolicyEngine/policyengine-us#10565 (merged 2026-11-02 14:44 UTC) added UPRATING_READERS, a hard-coded list of the parameters whose uprating metadata names gov.ssa.uprating.
• PolicyEngine/policyengine-us#10378 (merged 2026-11-02 16:36 UTC) added gov.states.ak.dpa.ssp.income_eligibility_standard.individual and .couple, which name that path. Its branch last merged main before 10565, so its CI never ran this test.

The test's docstring asks for a look at each new reader before it joins the list. The Alaska standards belong there: 7 AAC 40.310(c) raises them each January 1 by the Social Security cost-of-living percentage, so a different CPI-W path should move them.

This PR adds the two Alaska paths to the list. Only the test list changes, plus the changelog fragment. No parameter, formula or policy value changes.

A search of the repository found no other hard-coded copy of the list.

Test plan

Not run locally; CI runs this test. By reading the code at main:

• The 13 parameter files that name gov.ssa.uprating are the 11 paths already on the list plus these two, so the expected set matches. The expected NAWI readers are unchanged.
• Both Alaska files fit the parametrized tests that read this list: a plain values: block, a last stated value of 2027-01-01 (on or before 2027-12-31) and rounding of type nearest, interval 1. They also pass the reform's own checks: no at_defined_interval or start_instant.
• Policy YAML tests from an external source: not applicable, no policy change.
• Source-conflict register entry: not applicable.
• ruff format --check on the changed test file
• Changelog fragment in changelog.d/

axiom: n/a: test list update only; no policy, parameter or formula changes.

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