feat: form-input library with schema parsing and endpoint

backend/app/flows/schemas.py

@@ -37,6 +37,18 @@ class FlowVersionRead(BaseModel):
     deployed_at: datetime | None
     author: str
     created_at: datetime
+    input_schema: dict | None = None
+
+
+class InputSchemaRead(BaseModel):
+    """Form schema of the latest deployed version (RJSF renders it)."""
+
+    flow_id: UUID
+    version_no: int
+    json_schema: dict
+    ui_schema: dict = Field(default_factory=dict)
+    # Set when the flow has no CustomInput node: render a free-text box.
+    fallback: str | None = None
 
 
 class RunRequest(BaseModel):