Early on Monday, 31-year-old Saiful Shukeri became one of the first commuters to cross the land border between Singapore and Malaysia since it was closed amid the coronavirus pandemic in March.The engineer, who arrived at Tuas on the western end of Singapore at 6.45am armed with his “periodic commuting arrangement” papers, said he was “very, very, very excited” to be reunited with his family in Klang, Selangor state, who he has not seen in five months.His daughter turned three while he was…