Backdate Colorado SSP parameters to program inception

[mattunrath]

Summary

Backdate Colorado State Supplementary Payment (SSP) parameters and fix existing implementation issues.

Current State

• grant_standard.yaml has entries for 2023-2025 only
• Current values ($914/$943/$967) appear to be federal SSI amounts, not Colorado SSP amounts
• age_range excludes persons 60+ which may conflict with SSP covering aged persons

Goals

• Research and add historical Colorado SSP parameter values
• Fix grant_standard to reflect correct SSP amounts
• Verify age eligibility criteria
• Add comprehensive tests

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