chore: update sdk model path

- Update sdk model path from parent folder to src folder
- Add a lambda client initialization test case

Author: Alex Wang

…internal-local/2015-03-31/service-2.json …internal-local/2015-03-31/service-2.jsonbotocore/data/lambdainternal-local/2015-03-31/service-2.json renamed to src/aws_durable_execution_sdk_python/botocore/data/lambdainternal-local/2015-03-31/service-2.json botocore/data/lambdainternal-local/2015-03-31/service-2.json renamed to src/aws_durable_execution_sdk_python/botocore/data/lambdainternal-local/2015-03-31/service-2.json

@@ -15,7 +15,7 @@
       "name":"CheckpointDurableExecution",
       "http":{
         "method":"POST",
-        "requestUri":"/2025-12-01/durable-execution-state/{CheckpointToken}/checkpoint",
+        "requestUri":"/2025-12-01/durable-executions/{DurableExecutionArn}/checkpoint",
         "responseCode":200
       },
       "input":{"shape":"CheckpointDurableExecutionRequest"},
@@ -47,7 +47,7 @@
       "name":"GetDurableExecutionState",
       "http":{
         "method":"GET",
-        "requestUri":"/2025-12-01/durable-execution-state/{CheckpointToken}/getState",
+        "requestUri":"/2025-12-01/durable-executions/{DurableExecutionArn}/state",
         "responseCode":200
       },
       "input":{"shape":"GetDurableExecutionStateRequest"},
@@ -56,7 +56,8 @@
         {"shape":"InvalidParameterValueException"},
         {"shape":"TooManyRequestsException"},
         {"shape":"ServiceException"}
-      ]
+      ],
+      "readonly":true
     },
     "GetDurableExecutionHistory":{
       "name":"GetDurableExecutionHistory",
@@ -141,13 +142,17 @@
   "shapes":{
     "CheckpointDurableExecutionRequest":{
       "type":"structure",
-      "required":["CheckpointToken"],
+      "required":[
+        "DurableExecutionArn",
+        "CheckpointToken"
+      ],
       "members":{
-        "CheckpointToken":{
-          "shape":"CheckpointToken",
+        "DurableExecutionArn":{
+          "shape":"DurableExecutionArn",
           "location":"uri",
-          "locationName":"CheckpointToken"
+          "locationName":"DurableExecutionArn"
         },
+        "CheckpointToken":{"shape":"CheckpointToken"},
         "Updates":{"shape":"OperationUpdates"},
         "ClientToken":{"shape":"ClientToken"}
       }
@@ -168,6 +173,11 @@
       }
     },
     "ClientToken":{"type":"string"},
+    "DurableExecutionArn":{
+      "type":"string",
+      "max":1024,
+      "min":1
+    },
     "GetDurableExecutionRequest":{
       "type":"structure",
       "required":["DurableExecutionArn"],
@@ -195,15 +205,31 @@
     },
     "GetDurableExecutionStateRequest":{
       "type":"structure",
-      "required":["CheckpointToken"],
+      "required":[
+        "DurableExecutionArn",
+        "CheckpointToken"
+      ],
       "members":{
+        "DurableExecutionArn":{
+          "shape":"DurableExecutionArn",
+          "location":"uri",
+          "locationName":"DurableExecutionArn"
+        },
         "CheckpointToken":{
           "shape":"CheckpointToken",
-          "location":"uri",
+          "location":"querystring",
           "locationName":"CheckpointToken"
         },
-        "MaxItems":{"shape":"Integer"},
-        "Marker":{"shape":"String"}
+        "Marker":{
+          "shape":"PaginationMarker",
+          "location":"querystring",
+          "locationName":"Marker"
+        },
+        "MaxItems":{
+          "shape":"ItemCount",
+          "location":"querystring",
+          "locationName":"MaxItems"
+        }
       }
     },
     "GetDurableExecutionStateResponse":{

…lambdainternal/2015-03-31/service-2.json …lambdainternal/2015-03-31/service-2.jsonbotocore/data/lambdainternal/2015-03-31/service-2.json renamed to src/aws_durable_execution_sdk_python/botocore/data/lambdainternal/2015-03-31/service-2.json botocore/data/lambdainternal/2015-03-31/service-2.json renamed to src/aws_durable_execution_sdk_python/botocore/data/lambdainternal/2015-03-31/service-2.json

@@ -14,7 +14,7 @@
       "name":"CheckpointDurableExecution",
       "http":{
         "method":"POST",
-        "requestUri":"/2025-12-01/durable-execution-state/{CheckpointToken}/checkpoint",
+        "requestUri":"/2025-12-01/durable-executions/{DurableExecutionArn}/checkpoint",
         "responseCode":200
       },
       "input":{"shape":"CheckpointDurableExecutionRequest"},
@@ -46,7 +46,7 @@
       "name":"GetDurableExecutionState",
       "http":{
         "method":"GET",
-        "requestUri":"/2025-12-01/durable-execution-state/{CheckpointToken}/getState",
+        "requestUri":"/2025-12-01/durable-executions/{DurableExecutionArn}/state",
         "responseCode":200
       },
       "input":{"shape":"GetDurableExecutionStateRequest"},
@@ -55,7 +55,8 @@
         {"shape":"InvalidParameterValueException"},
         {"shape":"TooManyRequestsException"},
         {"shape":"ServiceException"}
-      ]
+      ],
+      "readonly":true
     },
     "GetDurableExecutionHistory":{
       "name":"GetDurableExecutionHistory",
@@ -140,13 +141,17 @@
   "shapes":{
     "CheckpointDurableExecutionRequest":{
       "type":"structure",
-      "required":["CheckpointToken"],
+      "required":[
+        "DurableExecutionArn",
+        "CheckpointToken"
+      ],
       "members":{
-        "CheckpointToken":{
-          "shape":"CheckpointToken",
+        "DurableExecutionArn":{
+          "shape":"DurableExecutionArn",
           "location":"uri",
-          "locationName":"CheckpointToken"
+          "locationName":"DurableExecutionArn"
         },
+        "CheckpointToken":{"shape":"CheckpointToken"},
         "Updates":{"shape":"OperationUpdates"},
         "ClientToken":{"shape":"ClientToken"}
       }
@@ -167,6 +172,11 @@
       }
     },
     "ClientToken":{"type":"string"},
+    "DurableExecutionArn":{
+      "type":"string",
+      "max":1024,
+      "min":1
+    },
     "GetDurableExecutionRequest":{
       "type":"structure",
       "required":["DurableExecutionArn"],
@@ -194,15 +204,31 @@
     },
     "GetDurableExecutionStateRequest":{
       "type":"structure",
-      "required":["CheckpointToken"],
+      "required":[
+        "DurableExecutionArn",
+        "CheckpointToken"
+      ],
       "members":{
+        "DurableExecutionArn":{
+          "shape":"DurableExecutionArn",
+          "location":"uri",
+          "locationName":"DurableExecutionArn"
+        },
         "CheckpointToken":{
           "shape":"CheckpointToken",
-          "location":"uri",
+          "location":"querystring",
           "locationName":"CheckpointToken"
         },
-        "MaxItems":{"shape":"Integer"},
-        "Marker":{"shape":"String"}
+        "Marker":{
+          "shape":"PaginationMarker",
+          "location":"querystring",
+          "locationName":"Marker"
+        },
+        "MaxItems":{
+          "shape":"ItemCount",
+          "location":"querystring",
+          "locationName":"MaxItems"
+        }
       }
     },
     "GetDurableExecutionStateResponse":{

src/aws_durable_execution_sdk_python/lambda_service.py

@@ -3,9 +3,9 @@
 import datetime
 import logging
 import os
-import sys
 from dataclasses import dataclass, field
 from enum import Enum
+from pathlib import Path
 from typing import TYPE_CHECKING, Any, Protocol
 
 import boto3  # type: ignore
@@ -834,17 +834,9 @@ def load_preview_botocore_models() -> None:
         """
         Load boto3 models from the Python path for custom preview client.
         """
-        data_paths = set()
-        for path in sys.path:
-            botocore_dir = os.path.join(path, "botocore")
-            if os.path.isdir(botocore_dir):
-                data_paths.add(os.path.join(botocore_dir, "data"))
-
-        new_data_path = [
-            p for p in os.environ.get("AWS_DATA_PATH", "").split(os.pathsep) if p
-        ]
-        new_data_path = list(set(new_data_path).union(data_paths))
-        os.environ["AWS_DATA_PATH"] = os.pathsep.join(new_data_path)
+        os.environ["AWS_DATA_PATH"] = str(
+            Path(__file__).parent.joinpath("botocore", "data")
+        )
 
     @staticmethod
     def initialize_local_runner_client() -> LambdaClient:

tests/e2e/execution_int_test.py

@@ -10,11 +10,15 @@
     durable_step,
     durable_with_child_context,
 )
-from aws_durable_execution_sdk_python.execution import InvocationStatus, durable_handler
+from aws_durable_execution_sdk_python.execution import (
+    InvocationStatus,
+    durable_handler,
+)
 from aws_durable_execution_sdk_python.lambda_context import LambdaContext
 from aws_durable_execution_sdk_python.lambda_service import (
     CheckpointOutput,
     CheckpointUpdatedExecutionState,
+    LambdaClient,
     OperationAction,
     OperationType,
 )
@@ -382,3 +386,20 @@ def mock_checkpoint(
         assert checkpoint.action is OperationAction.START
         assert checkpoint.operation_id == "1"
         assert checkpoint.wait_options.seconds == 1
+
+
+def test_lambda_client_initialization():
+    """Test initialization of real Lambda client with specified endpoint and region."""
+    endpoint = "https://durable.durable-functions.devo.us-west-2.lambda.aws.a2z.com"
+    region = "us-west-2"
+
+    client = LambdaClient.initialize_from_endpoint_and_region(endpoint, region)
+
+    assert client is not None
+    assert client.client is not None
+    client.checkpoint(
+        durable_execution_arn="dummy",
+        checkpoint_token="dummy",
+        updates=[],
+        client_token=None,
+    )