fix(server): correct A2aRequest.method usage and A2A test payloads

asgi_app.py logged a2a_request.operation (no such attribute on
A2aRequest) instead of a2a_request.method — Pyright error.

Both the Behave step definition and the Robot integration helper
sent {"operation": ...} in the JSON body, but A2aRequest requires
{"method": ...} per JSON-RPC 2.0, causing validation to return 400.

The health-check handler returned {"status": "healthy"} while every
test asserted "ok"; align the handler to return "ok".

The A2A response status assertion checked data.get("status") directly
on the JSON-RPC envelope instead of data["result"]["status"]; fixed
in both the Behave step and the Robot helper.

features/steps/server_lifecycle_steps.py

@@ -122,7 +122,7 @@ def step_get_agent_card(context: Any) -> None:
 
 @when('I POST a JSON-RPC request to /a2a with operation "{operation}"')
 def step_post_a2a(context: Any, operation: str) -> None:
-    payload = {"operation": operation, "params": {}}
+    payload = {"method": operation, "params": {}}
     context.response = context.test_client.post("/a2a", json=payload)
 
 
@@ -148,7 +148,8 @@ def step_check_response_body(context: Any, text: str) -> None:
 @then('the A2A response status should be "{expected_status}"')
 def step_check_a2a_status(context: Any, expected_status: str) -> None:
     data = context.response.json()
-    assert data.get("status") == expected_status, (
+    result = data.get("result", {})
+    assert result.get("status") == expected_status, (
         f"Expected A2A status '{expected_status}', got {data}"
     )
 

robot/helper_server_lifecycle.py

@@ -59,11 +59,11 @@ def _test_a2a_dispatch() -> None:
 
     app = create_asgi_app()
     client = TestClient(app)
-    payload = {"operation": "_cleveragents/health/check", "params": {}}
+    payload = {"method": "_cleveragents/health/check", "params": {}}
     resp = client.post("/a2a", json=payload)
     assert resp.status_code == 200
     data = resp.json()
-    assert data["status"] == "ok"
+    assert data["result"]["status"] == "ok"
     print("a2a-dispatch-ok")
 
 

src/cleveragents/a2a/facade.py

@@ -757,7 +757,7 @@ class A2aLocalFacade:
     # ------------------------------------------------------------------
 
     def _handle_health_check(self, params: dict[str, Any]) -> dict[str, Any]:
-        return {"status": "healthy", "services": {}}
+        return {"status": "ok", "services": {}}
 
     def _handle_diagnostics_run(self, params: dict[str, Any]) -> dict[str, Any]:
         return {"status": "ok", "diagnostics": {}, "stub": True}

src/cleveragents/infrastructure/server/asgi_app.py

@@ -143,7 +143,7 @@ def create_asgi_app(
         except A2aOperationNotFoundError as exc:
             logger.warning(
                 "a2a.server.method_not_found",
-                operation=a2a_request.operation,
+                operation=a2a_request.method,
             )
             return JSONResponse(
                 status_code=404,