Add validation warnings to critical imports

docs/critical_import_tool.md

@@ -383,6 +383,7 @@ This includes:
 
 - overall validity
 - validation errors
+- validation warnings
 - row count
 - cell count
 
@@ -490,6 +491,12 @@ If validation fails:
 - SQLite load is aborted
 - the command returns an error
 
+If validation succeeds with warnings:
+
+- artifacts still record the warnings
+- SQLite load continues
+- the CLI prints each warning before reporting the successful load
+
 This design is deliberate. It is safer to reject ambiguous extraction than to load a nearly-correct but wrong lookup table.
 
 ## Database Load Behavior