Add Orange County General Relief partial screen

[hua7450]

Summary

Adds a partial Orange County, California General Relief (GR) screen — eligibility, income, and resource rules from the official Orange County SSA regulations. The program is registered as partial because Orange County does not publish the Maximum Aid Payment (MAP) schedule or component values needed to compute the monthly grant.

Closes #8556

Regulatory Authority

• Orange County General Relief regulations
• Orange County General Relief FAQ

What's modeled

Area	Modeled	Basis
Geography	Current Orange County residence	county_str == ORANGE_COUNTY_CA
Demographic	Adults without minor children	Sec 20, Sec 80.2.d, Sec 20.4.b
Immigration	Citizen, permanent resident, deportation-withheld	Sec 40.1
Other cash aid	SSI/SSP, CalWORKs, and CAPI recipients excluded	Sec 20.4.b ("another type of public assistance")
Resources	Primary-home equity ($5,000), combined property ($1,000), one-vehicle exclusion ($4,650), excess liquid resources ($50 disregard)	Sec 50, Sec 60
Income	Earned/unearned source lists, 20% earned-income deduction, health-premium and court-ordered-support deductions	Sec 70.2

Key design decisions

• Adults without minor children. The screen denies a unit containing a minor child — not because a child mechanically bars the adult, but because a family with a child is routed to CalWORKs: the unit must apply for any aid it appears eligible for or be ineligible (Sec 20, "Failure … to apply for any aid … results in ineligibility"), a CalWORKs-receiving parent is an excluded member (Sec 20.4.b), and a parent who has exhausted the CalWORKs time limit is excluded from the GR MAP until all children turn 18 (Sec 80.2.d). There is no realistic family where a child receives CalWORKs and that child's parent receives GR.
• CAPI exclusion. CAPI (California's SSI-equivalent cash aid for immigrants) recipients are excluded under Sec 20.4.b's non-exhaustive "another type of public assistance." This is the case that nothing else catches: a recently-arrived aged/disabled permanent resident who receives CAPI rather than SSI (so an ssi > 0 check misses them) but is otherwise GR-eligible.

Who is eligible

The modeled eligible population is narrow: able-bodied, non-aged, childless adults who are citizens / permanent residents / deportation-withheld, with assets below the limits (and low income, which is not modeled). Aged or disabled applicants are swept into SSI or CAPI; applicants with children are routed to CalWORKs.

Not modeled (deferred)

• Ordinary monthly MAP payment and component values (housing/utility, food, transportation, clothing) — not published by Orange County.
• GR income limit; 15-day prior residence; full GR economic-unit construction; sponsor deeming; work compliance / sanctions; payment history.
• Refugee Cash Assistance (no California RCA variable in PolicyEngine); the T/U-visa / VAWA crime-victim immigration pathway (no enum value); detailed asset exclusions ($500 personal effects, $1,000 burial reserve) and mandatory tax on unearned income.

Tests

Tests describe families with real inputs (age, disability, immigration, work history, income, assets) and let the model determine SSI / CalWORKs / CAPI receipt and its effect on GR eligibility — including an eligibility-map integration set that demonstrates the narrow eligible population.

• policyengine-core test policyengine_us/tests/policy/baseline/gov/local/ca/oc/general_relief -c policyengine_us — 43 passed
• make format

Files

• policyengine_us/parameters/gov/local/ca/oc/general_relief/
• policyengine_us/variables/gov/local/ca/oc/
• policyengine_us/tests/policy/baseline/gov/local/ca/oc/general_relief/
• sources/working_references.md

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (fa285ae) to head (37370ba).
⚠️ Report is 26 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
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  Coverage   100.00%   100.00%            
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  Files            5        19    +14     
  Lines           62       217   +155     
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+ Hits            62       217   +155     

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

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