fix: use codegen for SequenceLength shape instead of manual shapes.py edit

Add SequenceLength to service-2.json and regenerate shapes.py via codegen
(python -m sagemaker.core.tools.codegen) instead of editing shapes.py manually.

Author: guanweim

sagemaker-core/sample/sagemaker/2017-07-24/service-2.json

@@ -43236,6 +43236,10 @@
         "EvaluatorArn":{
           "shape":"EvaluatorArn",
           "documentation":"<p> The evaluator Amazon Resource Name (ARN) used as reward function or reward prompt. </p>"
+        },
+        "SequenceLength":{
+          "shape":"SequenceLength",
+          "documentation":"<p> The sequence length for the training job. </p>"
         }
       },
       "documentation":"<p> The configuration for the serverless training job. </p>"
@@ -43247,6 +43251,19 @@
         "Evaluation"
       ]
     },
+    "SequenceLength":{
+      "type":"string",
+      "enum":[
+        "1K",
+        "2K",
+        "4K",
+        "8K",
+        "16K",
+        "32K",
+        "64K",
+        "128K"
+      ]
+    },
     "ServerlessMaxConcurrency":{
       "type":"integer",
       "box":true,

sagemaker-core/src/sagemaker/core/shapes/shapes.py

@@ -9588,7 +9588,7 @@ class ServerlessJobConfig(Base):
     peft:  The parameter-efficient fine-tuning configuration.
     evaluation_type:  The evaluation job type. Required when serverless job type is Evaluation.
     evaluator_arn:  The evaluator Amazon Resource Name (ARN) used as reward function or reward prompt.
-    sequence_length: The sequence length for the training job. Valid values are "1K", "2K", "4K", "8K", "16K", "32K", "64K", "128K".
+    sequence_length:  The sequence length for the training job.
     """
 
     base_model_arn: StrPipeVar
@@ -9600,6 +9600,7 @@ class ServerlessJobConfig(Base):
     evaluator_arn: Optional[StrPipeVar] = Unassigned()
     sequence_length: Optional[StrPipeVar] = Unassigned()
 
+
 class MlflowConfig(Base):
     """
     MlflowConfig

sagemaker-core/src/sagemaker/core/utils/code_injection/shape_dag.py

@@ -15877,6 +15877,7 @@
             {"name": "Peft", "shape": "Peft", "type": "string"},
             {"name": "EvaluationType", "shape": "EvaluationType", "type": "string"},
             {"name": "EvaluatorArn", "shape": "EvaluatorArn", "type": "string"},
+            {"name": "SequenceLength", "shape": "SequenceLength", "type": "string"},
         ],
         "type": "structure",
     },