feat(graph_engine): Support pausing workflow graph executions (#26585)

Signed-off-by: -LAN- <laipz8200@outlook.com>

api/tests/integration_tests/workflow/nodes/test_code.py

@@ -5,12 +5,13 @@ import pytest
 
 from configs import dify_config
 from core.app.entities.app_invoke_entities import InvokeFrom
-from core.workflow.entities import GraphInitParams, GraphRuntimeState, VariablePool
+from core.workflow.entities import GraphInitParams
 from core.workflow.enums import WorkflowNodeExecutionStatus
 from core.workflow.graph import Graph
 from core.workflow.node_events import NodeRunResult
 from core.workflow.nodes.code.code_node import CodeNode
 from core.workflow.nodes.node_factory import DifyNodeFactory
+from core.workflow.runtime import GraphRuntimeState, VariablePool
 from core.workflow.system_variable import SystemVariable
 from models.enums import UserFrom
 from tests.integration_tests.workflow.nodes.__mock.code_executor import setup_code_executor_mock

api/tests/integration_tests/workflow/nodes/test_http.py

@@ -5,10 +5,11 @@ from urllib.parse import urlencode
 import pytest
 
 from core.app.entities.app_invoke_entities import InvokeFrom
-from core.workflow.entities import GraphInitParams, GraphRuntimeState, VariablePool
+from core.workflow.entities import GraphInitParams
 from core.workflow.graph import Graph
 from core.workflow.nodes.http_request.node import HttpRequestNode
 from core.workflow.nodes.node_factory import DifyNodeFactory
+from core.workflow.runtime import GraphRuntimeState, VariablePool
 from core.workflow.system_variable import SystemVariable
 from models.enums import UserFrom
 from tests.integration_tests.workflow.nodes.__mock.http import setup_http_mock
@@ -174,13 +175,13 @@ def test_custom_authorization_header(setup_http_mock):
 @pytest.mark.parametrize("setup_http_mock", [["none"]], indirect=True)
 def test_custom_auth_with_empty_api_key_does_not_set_header(setup_http_mock):
     """Test: In custom authentication mode, when the api_key is empty, no header should be set."""
-    from core.workflow.entities.variable_pool import VariablePool
     from core.workflow.nodes.http_request.entities import (
         HttpRequestNodeAuthorization,
         HttpRequestNodeData,
         HttpRequestNodeTimeout,
     )
     from core.workflow.nodes.http_request.executor import Executor
+    from core.workflow.runtime import VariablePool
     from core.workflow.system_variable import SystemVariable
 
     # Create variable pool

api/tests/integration_tests/workflow/nodes/test_llm.py

@@ -6,12 +6,13 @@ from unittest.mock import MagicMock, patch
 
 from core.app.entities.app_invoke_entities import InvokeFrom
 from core.llm_generator.output_parser.structured_output import _parse_structured_output
-from core.workflow.entities import GraphInitParams, GraphRuntimeState, VariablePool
+from core.workflow.entities import GraphInitParams
 from core.workflow.enums import WorkflowNodeExecutionStatus
 from core.workflow.graph import Graph
 from core.workflow.node_events import StreamCompletedEvent
 from core.workflow.nodes.llm.node import LLMNode
 from core.workflow.nodes.node_factory import DifyNodeFactory
+from core.workflow.runtime import GraphRuntimeState, VariablePool
 from core.workflow.system_variable import SystemVariable
 from extensions.ext_database import db
 from models.enums import UserFrom

api/tests/integration_tests/workflow/nodes/test_parameter_extractor.py

@@ -5,11 +5,12 @@ from unittest.mock import MagicMock
 
 from core.app.entities.app_invoke_entities import InvokeFrom
 from core.model_runtime.entities import AssistantPromptMessage
-from core.workflow.entities import GraphInitParams, GraphRuntimeState, VariablePool
+from core.workflow.entities import GraphInitParams
 from core.workflow.enums import WorkflowNodeExecutionStatus
 from core.workflow.graph import Graph
 from core.workflow.nodes.node_factory import DifyNodeFactory
 from core.workflow.nodes.parameter_extractor.parameter_extractor_node import ParameterExtractorNode
+from core.workflow.runtime import GraphRuntimeState, VariablePool
 from core.workflow.system_variable import SystemVariable
 from extensions.ext_database import db
 from models.enums import UserFrom

api/tests/integration_tests/workflow/nodes/test_template_transform.py

@@ -4,11 +4,12 @@ import uuid
 import pytest
 
 from core.app.entities.app_invoke_entities import InvokeFrom
-from core.workflow.entities import GraphInitParams, GraphRuntimeState, VariablePool
+from core.workflow.entities import GraphInitParams
 from core.workflow.enums import WorkflowNodeExecutionStatus
 from core.workflow.graph import Graph
 from core.workflow.nodes.node_factory import DifyNodeFactory
 from core.workflow.nodes.template_transform.template_transform_node import TemplateTransformNode
+from core.workflow.runtime import GraphRuntimeState, VariablePool
 from core.workflow.system_variable import SystemVariable
 from models.enums import UserFrom
 from tests.integration_tests.workflow.nodes.__mock.code_executor import setup_code_executor_mock

api/tests/integration_tests/workflow/nodes/test_tool.py

@@ -4,12 +4,13 @@ from unittest.mock import MagicMock
 
 from core.app.entities.app_invoke_entities import InvokeFrom
 from core.tools.utils.configuration import ToolParameterConfigurationManager
-from core.workflow.entities import GraphInitParams, GraphRuntimeState, VariablePool
+from core.workflow.entities import GraphInitParams
 from core.workflow.enums import WorkflowNodeExecutionStatus
 from core.workflow.graph import Graph
 from core.workflow.node_events import StreamCompletedEvent
 from core.workflow.nodes.node_factory import DifyNodeFactory
 from core.workflow.nodes.tool.tool_node import ToolNode
+from core.workflow.runtime import GraphRuntimeState, VariablePool
 from core.workflow.system_variable import SystemVariable
 from models.enums import UserFrom