feature: added support as source for ducklake

cli/src/main/java/com/adaptivescale/rosetta/cli/ConfigYmlConverter.java

@@ -39,6 +39,20 @@ private Config processConfigParameters(String configContent) throws IOException
             StringSubstitutor stringSubstitutor = new StringSubstitutor(configParameters, "${", "}");
             String processedUrl = stringSubstitutor.replace(connection.getUrl());
             connection.setUrl(processedUrl);
+
+            // Process DuckLake-specific fields for environment variable substitution
+            if (connection.getDuckdbDatabasePath() != null) {
+                String processedDuckdbPath = stringSubstitutor.replace(connection.getDuckdbDatabasePath());
+                connection.setDuckdbDatabasePath(processedDuckdbPath);
+            }
+            if (connection.getDucklakeDataPath() != null) {
+                String processedDataPath = stringSubstitutor.replace(connection.getDucklakeDataPath());
+                connection.setDucklakeDataPath(processedDataPath);
+            }
+            if (connection.getDucklakeMetadataDb() != null) {
+                String processedMetadataDb = stringSubstitutor.replace(connection.getDucklakeMetadataDb());
+                connection.setDucklakeMetadataDb(processedMetadataDb);
+            }
         }
 
         return config;

common/src/main/java/com/adaptivescale/rosetta/common/models/input/Connection.java

@@ -16,6 +16,11 @@ public class Connection {
     private String userName;
     private String password;
     private Collection<String> tables = new ArrayList<>();
+
+    // DuckLake-specific fields
+    private String duckdbDatabasePath;
+    private String ducklakeDataPath;
+    private String ducklakeMetadataDb;
 
     public Connection() {
     }
@@ -84,6 +89,30 @@ public void setTables(Collection<String> tables) {
         this.tables = tables;
     }
 
+    public String getDuckdbDatabasePath() {
+        return duckdbDatabasePath;
+    }
+
+    public void setDuckdbDatabasePath(String duckdbDatabasePath) {
+        this.duckdbDatabasePath = duckdbDatabasePath;
+    }
+
+    public String getDucklakeDataPath() {
+        return ducklakeDataPath;
+    }
+
+    public void setDucklakeDataPath(String ducklakeDataPath) {
+        this.ducklakeDataPath = ducklakeDataPath;
+    }
+
+    public String getDucklakeMetadataDb() {
+        return ducklakeMetadataDb;
+    }
+
+    public void setDucklakeMetadataDb(String ducklakeMetadataDb) {
+        this.ducklakeMetadataDb = ducklakeMetadataDb;
+    }
+
     public Map<String, String> toMap() {
         ObjectMapper objectMapper = new ObjectMapper();
         return objectMapper.convertValue(this, Map.class);