DETROIT — The Oxford school district has sued its insurance company, seeking a court order to allow it to offer $5 million per bodily injury claim among the nine pending lawsuits stemming from the 2021 deadly attack at its high school. The lawsuit by Oxford Community Schools was filed Wednesday in Oakland County Circuit Court against MASB-SEG Property/Casualty Pool, a nonprofit risk-sharing pool providing coverage to Michigan’s public schools. It seeks a declaratory judgment that the Michigan school is not limited to a single $5 million cap in settling multiple lawsuit claims filed by families…