Brandon/cre 288 add telemetry to flows (#1391)

* Telemetry for flows

* store node names

src/crewai/flow/flow.py

@@ -1,7 +1,5 @@
 # flow.py
 
-# flow.py
-
 import asyncio
 import inspect
 from typing import Any, Callable, Dict, Generic, List, Set, Type, TypeVar, Union
@@ -9,6 +7,7 @@ from typing import Any, Callable, Dict, Generic, List, Set, Type, TypeVar, Union
 from pydantic import BaseModel
 
 from crewai.flow.flow_visualizer import plot_flow
+from crewai.telemetry import Telemetry
 
 T = TypeVar("T", bound=Union[BaseModel, Dict[str, Any]])
 
@@ -142,6 +141,8 @@ class FlowMeta(type):
 
 
 class Flow(Generic[T], metaclass=FlowMeta):
+    _telemetry = Telemetry()
+
     _start_methods: List[str] = []
     _listeners: Dict[str, tuple[str, List[str]]] = {}
     _routers: Dict[str, str] = {}
@@ -161,6 +162,8 @@ class Flow(Generic[T], metaclass=FlowMeta):
         self._pending_and_listeners: Dict[str, Set[str]] = {}
         self._method_outputs: List[Any] = []  # List to store all method outputs
 
+        self._telemetry.flow_creation_span(self.__class__.__name__)
+
         for method_name in dir(self):
             if callable(getattr(self, method_name)) and not method_name.startswith(
                 "__"
@@ -190,6 +193,10 @@ class Flow(Generic[T], metaclass=FlowMeta):
         if not self._start_methods:
             raise ValueError("No start method defined")
 
+        self._telemetry.flow_execution_span(
+            self.__class__.__name__, list(self._methods.keys())
+        )
+
         # Create tasks for all start methods
         tasks = [
             self._execute_start_method(start_method)
@@ -270,5 +277,9 @@ class Flow(Generic[T], metaclass=FlowMeta):
 
             traceback.print_exc()
 
-    def plot(self, filename: str = "crewai_flow_graph"):
+    def plot(self, filename: str = "crewai_flow"):
+        self._telemetry.flow_plotting_span(
+            self.__class__.__name__, list(self._methods.keys())
+        )
+
         plot_flow(self, filename)