fix(metrics) Merge metrics of agent LLM and condenser LLM (#7890)

Co-authored-by: Carlos Freund <carlosfreund@gmail.com>

openhands/controller/agent_controller.py

@@ -67,7 +67,6 @@ from openhands.events.observation import (
 )
 from openhands.events.serialization.event import event_to_trajectory, truncate_content
 from openhands.llm.llm import LLM
-from openhands.llm.metrics import Metrics
 
 # note: RESUME is only available on web GUI
 TRAFFIC_CONTROL_REMINDER = (
@@ -1142,15 +1141,21 @@ class AgentController:
         - accumulated_cost: The current total cost
         - accumulated_token_usage: Accumulated token statistics across all API calls
 
+        This includes metrics from both the agent's LLM and the condenser's LLM if it exists.
+
         Args:
             action: The action to attach metrics to
         """
+        metrics = self.agent.llm.metrics.copy()
+
+        # Include condenser metrics if they exist
+        if hasattr(self.agent, 'condenser') and hasattr(self.agent.condenser, 'llm'):
+            metrics.merge(self.agent.condenser.llm.metrics)
+
         # Create a minimal metrics object with just what the frontend needs
-        metrics = Metrics(model_name=self.agent.llm.metrics.model_name)
-        metrics.accumulated_cost = self.agent.llm.metrics.accumulated_cost
-        metrics._accumulated_token_usage = (
-            self.agent.llm.metrics.accumulated_token_usage
-        )
+        metrics._token_usages = []
+        metrics._response_latencies = []
+        metrics._costs = []
 
         action.llm_metrics = metrics