Legal corpus: seed U.S. Code Title 52

Makefile

@@ -1,7 +1,7 @@
 # Republic OS — repeatable pipeline commands.
 # The build is deterministic: `make build` twice yields a byte-identical tree.
 
-.PHONY: build validate check
+.PHONY: build validate legal-us-code check
 
 build:        ## Regenerate the entity tree from raw exports in data/
 	python3 scripts/build.py
@@ -12,4 +12,7 @@ validate:     ## Check every entity file: OKF, schema, and link integrity
 changelog:    ## What changed in the government since the last commit (BASE/HEAD overridable)
 	python3 scripts/generate_changelog.py $(BASE) $(HEAD)
 
+legal-us-code: ## Ingest the pinned U.S. Code Title 52 seed corpus
+	python3 scripts/ingest_us_code.py --title 52
+
 check: build validate  ## Build, then validate — the full gate