fixup! [u r] Add type and domain fields to TDRSourceSpec (#6426)

Author: nadove-ucsc

src/azul/terra.py

@@ -5,7 +5,10 @@
 from collections.abc import (
     Sequence,
 )
-import enum
+from enum import (
+    StrEnum,
+    auto,
+)
 import json
 import logging
 from time import (
@@ -95,13 +98,13 @@
 
 @attrs.frozen(kw_only=True)
 class TDRSourceSpec(SourceSpec):
-    class Type(enum.Enum):
-        bigquery = 'bigquery'
-        parquet = 'parquet'
+    class Type(StrEnum):
+        bigquery = auto()
+        parquet = auto()
 
-    class Domain(enum.Enum):
-        gcp = 'gcp'
-        azure = 'azure'
+    class Domain(StrEnum):
+        gcp = auto()
+        azure = auto()
 
     type: Type
     domain: Domain