Add provisional OACT long-run target source

Author: MaxGhenis

policyengine_us_data/datasets/cps/long_term/README.md

@@ -181,6 +181,7 @@ python run_household_projection_parallel.py \
 **Local files** (in `policyengine_us_data/storage/`):
 - `SSPopJul_TR2024.csv` - Population projections 2025-2100 by single year of age
 - `long_term_target_sources/trustees_2025_current_law.csv` - explicit frozen Trustees/current-law package
+- `long_term_target_sources/oact_2025_08_05_provisional.csv` - OACT-updated TOB package with provisional HI bridge
 - `long_term_target_sources/sources.json` - provenance metadata for named source packages
 - `ASSUMPTION_COMPARISON.md` - side-by-side summary of our calibration assumptions versus Trustees/OACT
 
@@ -205,6 +206,7 @@ python run_household_projection_parallel.py \
 - **`run_household_projection.py`** - Main projection script (see Quick Start)
 - **`calibration.py`** - IPF and GREG weight calibration implementations
 - **`ssa_data.py`** - Load SSA population and named long-term target source projections
+- **`build_long_term_target_sources.py`** - Rebuild named long-term target source packages
 - **`projection_utils.py`** - Utility functions (age matrix builder, H5 file creator)
 - **`extract_ssa_costs.py`** - One-time script to extract SSA data from Excel (already run)
 

policyengine_us_data/datasets/cps/long_term/run_household_projection.py

@@ -32,6 +32,7 @@
     python run_household_projection.py 2075 2100 --profile ss-payroll-tob --target-source trustees_2025_current_law --support-augmentation-profile donor-backed-synthetic-v1 --support-augmentation-target-year 2100 --allow-validation-failures
     python run_household_projection.py 2100 2100 --profile ss-payroll-tob --target-source trustees_2025_current_law --support-augmentation-profile donor-backed-composite-v1 --support-augmentation-target-year 2100 --support-augmentation-blueprint-base-weight-scale 0.5 --allow-validation-failures --save-h5
     python run_household_projection.py 2075 2100 --profile ss-payroll-tob --target-source trustees_2025_current_law --support-augmentation-profile donor-backed-composite-v1 --support-augmentation-align-to-run-year --support-augmentation-blueprint-base-weight-scale 0.5 --allow-validation-failures
+    python run_household_projection.py 2025 2100 --profile ss-payroll-tob --target-source oact_2025_08_05_provisional --save-h5
 """
 
 import sys

policyengine_us_data/storage/README.md

@@ -34,6 +34,8 @@
   • Source packages for long-term CPS calibration targets
   • Files:
      - `trustees_2025_current_law.csv`: explicit frozen copy of the legacy Trustees/current-law target path
+     - `oact_2025_08_05_provisional.csv`: OACT-updated TOB path with provisional HI bridge
+     - `oasdi_oact_20250805_nominal_delta.csv`: raw OASDI TOB deltas from the August 5, 2025 OACT letter
      - `sources.json`: provenance and source metadata for each named package
   • Notes: `run_household_projection.py --target-source ...` selects from these packages instead of relying on branch-specific data files