🔧 refactor(schemas.py): add optional tweaks field to PredictRequest schema

The PredictRequest schema now includes an optional tweaks field, which is a dictionary of dictionaries. This field allows for additional customization of the prediction request, such as specifying tool names or descriptions. The tweaks field is optional, and if not provided, the default value is an empty dictionary. The schema_extra attribute has also been updated to include an example of the new tweaks field.

src/backend/langflow/api/v1/schemas.py

@@ -1,6 +1,6 @@
-from typing import Any, Dict, List, Union
+from typing import Any, Dict, List, Optional, Union
 from langflow.database.models.flow import FlowCreate, FlowRead
-from pydantic import BaseModel, validator
+from pydantic import BaseModel, Field, validator
 
 
 class GraphData(BaseModel):
@@ -23,6 +23,23 @@ class PredictRequest(BaseModel):
     """Predict request schema."""
 
     message: str
+    tweaks: Optional[Dict[str, Dict[str, str]]] = Field(default_factory=dict)
+
+    class Config:
+        schema_extra = {
+            "example": {
+                "message": "Hello, how are you?",
+                "tweaks": {
+                    "dndnode_986363f0-4677-4035-9f38-74b94af5dd78": {
+                        "name": "A tool name",
+                        "description": "A tool description",
+                    },
+                    "dndnode_986363f0-4677-4035-9f38-74b94af57378": {
+                        "template": "A {template}",
+                    },
+                },
+            }
+        }
 
 
 class PredictResponse(BaseModel):