Implement Oregon Employment Related Day Care

[hua7450]

Closes #8991.

Summary

• implements Oregon Employment Related Day Care (ERDC) eligibility, countable income, copays, and benefits
• encodes all 2026 provider reimbursement rates for Areas A, B, and C
• uses Enum-indexed area, provider-type, age-group, and billing-tier dimensions, consolidating rates into three parameter files
• registers ERDC in Oregon and federal CCDF child care subsidy aggregators

Modeling notes

• or_erdc_provider_area and or_erdc_provider_type are direct inputs; the model does not track provider location or license type at the moment, so it defaults to AREA_C and CERTIFIED_CENTER. Because Areas B and C share the same rates, the AREA_C default understates benefits for Area A (metro ZIP) families; supply the input or populate it from data to override.
• a disabled second caretaker who cannot provide care is now excused from the need-hours minimum per OAR 414-175-0023(1)(b)(A), so a two-caretaker family is no longer denied when one caretaker is unable to work; a lone non-working caretaker still yields zero need hours
• TANF is listed but commented out of ERDC countable income because adding calculated tanf would create a circular dependency through child care expenses and TANF deductions
• administrative eligibility requirements that cannot be inferred from household inputs remain out of scope

Review fixes (round 5)

Criticals:

• add the CCDF immigration eligibility check (is_ccdf_immigration_eligible_child) to or_erdc_eligible_child, matching sibling state child care programs (45 CFR 98.20(a)(1)(ii))
• add pre-increase 2024-01-01 entries for the FAM/QFM license-exempt rates (Areas A/B/C × five age groups × two provider types, in both the hourly and monthly rate files) from the archived DELC 7492i (01/24) provider guide insert, so January–February 2026 and 2024–2025 no longer backward-extrapolate the March 1, 2026 rate increase
• read expanded child welfare (EXP-CW) eligibility at the month period in or_erdc_income_eligible instead of period.this_year, matching or_erdc_categorically_eligible

Should-address:

• exclude an excused (disabled) second caretaker from the need-hours min() per OAR 414-175-0023(1)(b)(A), guarded to multi-caretaker units so a lone non-working caretaker still yields zero hours
• corroborate the 215-hour monthly cap against the DELC rate chart's monthly billing range
• standardize all OAR references to rule-specific URLs (view.action?ruleNumber=414-175-00XX) in place of the division landing page
• document the provider area and provider type data limitations in the variable comments
• add 7 YAML test cases: multi-caretaker need-hours minimum, 20-hour weekly band edge, excused caretaker, unearned income in countable income, sub-bracket copay, non-categorical eligibility false, and per-business self-employment flooring

Sources

• OAR Chapter 414, Division 175
• Oregon DELC 2026 ERDC provider rate guide
• Oregon DELC 7492i (01/24) provider guide insert (archived)
• Oregon Programs Eligibility Notebook, July 2026

Validation

• 54 focused ERDC YAML cases (7 added in round 5); CI pending
• 12 parameter syntax, Enum breakdown, system import, and parameter code-health tests pass
• round-5 fixes verified statically (py_compile 10/10, YAML load 23/23) and confirmed clean by the implementation validator
• make format and Ruff checks pass
• official provider-rate PDF audit found no value or effective-date mismatches

The broad make test-yaml-structural target was stopped while it was spending several minutes in an unrelated existing contributed-policy batch; the direct parameter structural/import checks and all Oregon tests passed.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (ff39625) to head (51ff644).
⚠️ Report is 16 commits behind head on main.

Additional details and impacted files

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  Coverage   100.00%   100.00%            
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  Files            1        31    +30     
  Lines           18       432   +414     
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+ Hits            18       432   +414     

Flag	Coverage Δ
unittests	100.00% <100.00%> (ø)

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