update transformations per comments

Author: pnilan

airbyte_cdk/sources/declarative/transformations/config_transformations/config_transformation.py

@@ -3,7 +3,7 @@
 #
 
 from abc import ABC, abstractmethod
-from typing import Any, Dict
+from typing import Any, MutableMapping
 
 
 class ConfigTransformation(ABC):
@@ -14,7 +14,7 @@ class ConfigTransformation(ABC):
     @abstractmethod
     def transform(
         self,
-        config: Dict[str, Any],
+        config: MutableMapping[str, Any],
     ) -> None:
         """
         Transform a configuration by adding, deleting, or mutating fields directly from the config reference passed in argument.

airbyte_cdk/sources/declarative/transformations/config_transformations/remap_field.py

@@ -34,7 +34,7 @@ def __post_init__(self) -> None:
                 self._field_path[path_index] = InterpolatedString.create(
                     self.field_path[path_index], parameters={}
                 )
-        self._map = InterpolatedMapping(self.map, parameters={}).eval(config=self.config)
+        self._map = InterpolatedMapping(self.map, parameters={})
 
     def transform(
         self,
@@ -60,5 +60,7 @@ def transform(
 
         field_name = path_components[-1]
 
-        if field_name in current and current[field_name] in self._map:
-            current[field_name] = self._map[current[field_name]]
+        mapping = self._map.eval(config=self.config)
+
+        if field_name in current and current[field_name] in mapping:
+            current[field_name] = mapping[current[field_name]]