Fix exception handling issues

- Add 'from e' to exception raises for proper exception chaining (B904)
- Remove return from finally block to prevent exception silencing (B012)

Author: prassanna-ravishankar

examples/tutorials/10_agentic/00_base/080_batch_events/project/acp.py

@@ -199,19 +199,17 @@ async def handle_task_event_send(params: SendEventParams) -> None:
         logger.error(f"❌ Task cancelled: {e}")
         reset_to_ready = False
     finally:
-        if not reset_to_ready:
-            return
-        
-        # Always set status back to READY when done processing
-        try:
-            await adk.agent_task_tracker.update(
-                tracker_id=tracker.id,
-                status=Status.READY.value,
-                status_reason="Completed event processing - ready for new events"
-            )
-            logger.info(f"🟢 Set status back to READY - agent available for new events")
-        except Exception as e:
-            logger.error(f"❌ Error setting status back to READY: {e}")
+        if reset_to_ready:
+            # Always set status back to READY when done processing
+            try:
+                await adk.agent_task_tracker.update(
+                    tracker_id=tracker.id,
+                    status=Status.READY.value,
+                    status_reason="Completed event processing - ready for new events"
+                )
+                logger.info(f"🟢 Set status back to READY - agent available for new events")
+            except Exception as e:
+                logger.error(f"❌ Error setting status back to READY: {e}")
 
 
 @acp.on_task_cancel

src/agentex/lib/cli/commands/agents.py

@@ -293,10 +293,10 @@ def deploy(
         except EnvironmentsValidationError as e:
             error_msg = generate_helpful_error_message(e, "Environment validation failed")
             console.print(f"[red]Configuration Error:[/red]\n{error_msg}")
-            raise typer.Exit(1)
+            raise typer.Exit(1) from e
         except Exception as e:
             console.print(f"[red]Error:[/red] Failed to validate configuration: {e}")
-            raise typer.Exit(1)
+            raise typer.Exit(1) from e
 
         # Load manifest for credential validation
         manifest_obj = AgentManifest.from_yaml(str(manifest_path))

src/agentex/resources/agents.py

@@ -1081,8 +1081,8 @@ async def send_message_stream(
           except json.JSONDecodeError:
             # Skip invalid JSON lines
             continue
-          except ValidationError:
-            raise ValueError(f"Invalid SendMessageStreamResponse returned: {line}")
+          except ValidationError as e:
+            raise ValueError(f"Invalid SendMessageStreamResponse returned: {line}") from e
 
     async def send_event(
       self,