message: Add forgotten `operation_launched` events for the OmpExecutor (notably).
diff: @@ -620,7 +620,9 @@ class ExecutorBase : public Executor {
  public:
  void run(const Operation &op) const override
  {
  + this->template log<log::Logger::operation_launched>(this, &op);
  op.run(self()->shared_from_this());
  + this->template log<log::Logger::operation_completed>(this, &op);
  }
  protected:
  