feat: add us-cpa tax-year source corpus

skills/us-cpa/src/us_cpa/cli.py

@@ -6,6 +6,7 @@ import sys
 from pathlib import Path
 from typing import Any
 
+from us_cpa.sources import TaxYearCorpus, bootstrap_irs_catalog
 
 COMMANDS = (
     "question",
@@ -114,11 +115,15 @@ def main(argv: list[str] | None = None) -> int:
         return _emit(payload, args.format)
 
     if args.command == "fetch-year":
+        corpus = TaxYearCorpus()
+        manifest = corpus.download_catalog(args.tax_year, bootstrap_irs_catalog(args.tax_year))
         payload = {
             "command": "fetch-year",
             "format": args.format,
             "taxYear": args.tax_year,
-            "status": "not_implemented",
+            "status": "downloaded",
+            "sourceCount": manifest["sourceCount"],
+            "manifestPath": corpus.paths_for_year(args.tax_year).manifest_path.as_posix(),
         }
         return _emit(payload, args.format)