Python: Automate sample validation (#4193)

* Automate sample validation: part 1

* Automate sample validation: part 2

* Create GH workflow

* comments

* Fix mypy

python/samples/_sample_validation/workflow.py

@@ -0,0 +1,42 @@
+# Copyright (c) Microsoft. All rights reserved.
+
+"""
+Sample Validation Workflow using Microsoft Agent Framework.
+
+Workflow composition for sample validation.
+"""
+
+from _sample_validation.create_dynamic_workflow_executor import CreateConcurrentValidationWorkflowExecutor
+from _sample_validation.discovery import DiscoverSamplesExecutor, ValidationConfig
+from _sample_validation.report import GenerateReportExecutor
+from _sample_validation.run_dynamic_validation_workflow_executor import RunDynamicValidationWorkflowExecutor
+from agent_framework import Workflow, WorkflowBuilder
+
+
+def create_validation_workflow(
+    config: ValidationConfig,
+) -> Workflow:
+    """
+    Create the sample validation workflow.
+
+    Args:
+        config: Validation configuration
+
+    Returns:
+        Configured Workflow instance
+    """
+    discover = DiscoverSamplesExecutor(config)
+    create_dynamic_workflow = CreateConcurrentValidationWorkflowExecutor(config)
+    run_dynamic_workflow = RunDynamicValidationWorkflowExecutor()
+    generate = GenerateReportExecutor()
+
+    return (
+        WorkflowBuilder(start_executor=discover)
+        .add_edge(discover, create_dynamic_workflow)
+        .add_edge(create_dynamic_workflow, run_dynamic_workflow)
+        .add_edge(run_dynamic_workflow, generate)
+        .build()
+    )
+
+
+__all__ = ["ValidationConfig", "create_validation_workflow"]