Fixed apostrophe rendering in episode names (e.g., for "DAN DA DAN")
by replacing HTML character references (') with actual apostrophes.
Optimized performance by reusing a single Client instance, passing it to
parseEpisodesFromSeries() instead of creating a new instance in each loop.
Parallelized episode fetching in getDetail() using Promise.all to
improve request efficiency, replacing the sequential loop.
