fix: Refactor JSON serialization in build_flow and log_vertex_build (#5189)

* refactor(langflow): Update JSON serialization in build_flow and log_vertex_build

* Refactor JSON serialization in build_flow and log_vertex_build functions

* Refactor JSON serialization in build_flow and log_vertex_build functions

src/backend/base/langflow/graph/utils.py

@@ -176,6 +176,7 @@ async def log_vertex_build(
     try:
         if not get_settings_service().settings.vertex_builds_storage_enabled:
             return
+
         vertex_build = VertexBuildBase(
             flow_id=flow_id,
             id=vertex_id,

src/backend/base/langflow/services/tracing/schema.py

@@ -1,5 +1,7 @@
+from fastapi.encoders import jsonable_encoder
 from pydantic import BaseModel, field_serializer
 from pydantic.v1 import BaseModel as V1BaseModel
+from pydantic_core import PydanticSerializationError
 
 from langflow.schema.log import LoggableType
 
@@ -24,4 +26,8 @@ class Log(BaseModel):
             return value.to_json()
         if isinstance(value, BaseModel):
             return value.model_dump(exclude_none=True)
+        try:
+            value = jsonable_encoder(value)
+        except PydanticSerializationError:
+            return str(value)
         return value