test: move importer tests to tests/ (via DocumentParser)

crates/adapters/importer/tests/parsing_test.rs

@@ -1,4 +1,16 @@
-use super::*;
+use domain::{
+    models::{FileFormat, ParsedFile},
+    ports::DocumentParser,
+};
+use importer::ImporterDocumentParser;
+
+fn parse_csv(data: &[u8]) -> Result<ParsedFile, domain::models::ImportError> {
+    ImporterDocumentParser.parse(data, FileFormat::Csv)
+}
+
+fn parse_json(data: &[u8]) -> Result<ParsedFile, domain::models::ImportError> {
+    ImporterDocumentParser.parse(data, FileFormat::Json)
+}
 
 #[test]
 fn csv_parses_headers_and_rows() {