Restore full macro simulation outputs for single-year and budget-window results

[anth-volk]

Problem

Multi-year budget-window runs now expect each child year to validate as the gateway-owned SingleYearMacroOutput, but the simulation worker had been returning only the newer row-oriented PolicyEngine 4.4.x subset (budget, decile_impacts, program_statistics, etc.). That caused budget-window parent jobs to fail once live child simulations returned truncated outputs.

This also risked regular /jobs/{job_id} callers receiving a reduced macro result instead of the legacy full single-year report shape expected by existing app/client code.

Desired behavior

• Single-year macro simulations should return the full legacy macro output shape again.
• Budget-window outputsByYear should contain the full single-year macro outputs for each year.
• The newer row-oriented worker fields can remain as additional passthrough fields.
• Null-valued legacy sections such as wealth_decile, intra_wealth_decile, cliff_impact, and regional impact fields should remain present as JSON null, not be omitted by response serialization.
• Tests should assert the full annual shape across worker mapping, budget-window validation/orchestration, response serialization, and staging integration expectations.

Notes

The regression appears to have come from the PolicyEngine 4.4 worker migration, which replaced the old Simulation.calculate_economy_comparison().model_dump(mode="json") path with a hand-built result based on economic_impact_analysis. That hand-built result did not reconstruct the full legacy macro report shape.