T11: Organization, Company, link entities + round-trip [checkpoint]

szpitale-graph/src/main/java/com/developx/szpitale/load/CanonicalReader.java

@@ -4,6 +4,7 @@ import com.developx.szpitale.model.CanonicalDataset;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
 
+import java.io.File;
 import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
@@ -50,4 +51,10 @@ public class CanonicalReader {
     public CanonicalDataset readSingle(Path inputDir, String voivodeship) throws IOException {
         return readAll(inputDir, voivodeship).stream().findFirst().orElse(null);
     }
+
+    public static CanonicalDataset readDataset(File file) throws IOException {
+        ObjectMapper mapper = new ObjectMapper();
+        mapper.registerModule(new JavaTimeModule());
+        return mapper.readValue(file, CanonicalDataset.class);
+    }
 }