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

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

api/core/workflow/nodes/llm/llm_utils.py

@@ -15,9 +15,9 @@ from core.model_runtime.entities.model_entities import ModelType
 from core.model_runtime.model_providers.__base.large_language_model import LargeLanguageModel
 from core.prompt.entities.advanced_prompt_entities import MemoryConfig
 from core.variables.segments import ArrayAnySegment, ArrayFileSegment, FileSegment, NoneSegment, StringSegment
-from core.workflow.entities import VariablePool
 from core.workflow.enums import SystemVariableKey
 from core.workflow.nodes.llm.entities import ModelConfig
+from core.workflow.runtime import VariablePool
 from extensions.ext_database import db
 from libs.datetime_utils import naive_utc_now
 from models.model import Conversation

api/core/workflow/nodes/llm/node.py

@@ -52,7 +52,7 @@ from core.variables import (
     StringSegment,
 )
 from core.workflow.constants import SYSTEM_VARIABLE_NODE_ID
-from core.workflow.entities import GraphInitParams, VariablePool
+from core.workflow.entities import GraphInitParams
 from core.workflow.enums import (
     ErrorStrategy,
     NodeType,
@@ -71,6 +71,7 @@ from core.workflow.node_events import (
 from core.workflow.nodes.base.entities import BaseNodeData, RetryConfig, VariableSelector
 from core.workflow.nodes.base.node import Node
 from core.workflow.nodes.base.variable_template_parser import VariableTemplateParser
+from core.workflow.runtime import VariablePool
 
 from . import llm_utils
 from .entities import (
@@ -93,7 +94,7 @@ from .file_saver import FileSaverImpl, LLMFileSaver
 
 if TYPE_CHECKING:
     from core.file.models import File
-    from core.workflow.entities import GraphRuntimeState
+    from core.workflow.runtime import GraphRuntimeState
 
 logger = logging.getLogger(__name__)