addressing issue on session and exception

packages/lambda-python/.gitignore

@@ -16,4 +16,5 @@ test-env/
 remotion-env-lint/
 .idea
 
-justfile
+justfile
+.venv

packages/lambda-python/dev-requirements.txt

@@ -1,4 +1,5 @@
 pytest
 dotenv
 boto3-stubs[essential]
-mypy
+mypy
+boto3

packages/lambda-python/remotion_lambda/exception.py

@@ -0,0 +1,9 @@
+# pylint: disable=too-few-public-methods, missing-module-docstring, broad-exception-caught
+class RemotionException(Exception):
+    """Base exception for Remotion client errors."""
+
+class RemotionInvalidArgumentException(RemotionException, ValueError):
+    """Raised when an invalid argument is provided to a Remotion client method."""
+
+class RemotionRenderingOutputError(RemotionException):
+    """Raised when the Remotion rendering process returns an error."""