Add --output-microdata, rename reform to policy, clean up CLI

- Add --output-microdata DIR: writes persons.csv, benunits.csv,
  households.csv with all input fields + baseline/reform simulation
  outputs (taxes, benefits, net income, equivalised income)
- Rename --reform/--reform-json to --policy/--policy-json
- Remove --deciles flag and decile table from pretty output
- Default --output to json instead of pretty
- Reorganise CLI help with MODEL RUNS / DATA CREATION / PARAMETER
  INSPECTION usage examples
- Fix clean.rs BenUnit loading to use ..Default for new fields

Author: nikhilwoodruff

api/main.py

@@ -47,7 +47,7 @@ def _data_args(year: int) -> list[str]:
 def run_simulation(year: int, reform_json: Optional[str] = None) -> dict:
     cmd = [RUST_BINARY, "--year", str(year), "--output", "json"] + _data_args(year)
     if reform_json:
-        cmd += ["--reform-json", reform_json]
+        cmd += ["--policy-json", reform_json]
     try:
         result = subprocess.run(
             cmd, capture_output=True, text=True, timeout=120, cwd=ROOT_DIR

api/modal_app.py

@@ -93,7 +93,7 @@ def run_simulation(year: int, reform_json: Optional[str] = None) -> dict:
             "--output", "json",
         ] + _data_args()
         if reform_json:
-            cmd += ["--reform-json", reform_json]
+            cmd += ["--policy-json", reform_json]
         try:
             result = subprocess.run(
                 cmd, capture_output=True, text=True, timeout=120,