Lal/fix datapart type prod 14721 (#1054)

* rename dataset type relation to DB.

* set File as default type in dataset part

Author: lalepee

dataset/src/main/kotlin/com/cosmotech/dataset/service/DatasetServiceImpl.kt

@@ -442,7 +442,7 @@ class DatasetServiceImpl(
             name = datasetPartCreateRequest.name,
             description = datasetPartCreateRequest.description,
             tags = datasetPartCreateRequest.tags ?: mutableListOf(),
-            type = datasetPartCreateRequest.type ?: DatasetPartTypeEnum.Relational,
+            type = datasetPartCreateRequest.type ?: DatasetPartTypeEnum.File,
             organizationId = organizationId,
             workspaceId = workspaceId,
             createInfo = editInfo,

dataset/src/main/openapi/dataset.yaml

@@ -922,8 +922,8 @@ components:
       description: The dataset part Type
       enum:
         - File
-        - Relational
-      default: Relational
+        - DB
+      default: File
 
     DatasetPartFiles:
       type: array