(Reuters) – Chad’s transitional authorities and rebel groups are expected to sign an agreement in Doha on Monday paving the way to a broader national reconciliation dialogue later this month, the Qatari foreign ministry said. The announcement follows five months of peace-building talks in Qatar between rebel factions and Chad’s interim military government headed by Mahamat Idriss Deby, who seized power following his father’s death last year. Deby has said the dialogue would be a first step toward planning long-awaited elections. But it has not been clear if the armed groups would participate i…