Synopsis: Sanju Samson’s first century in yellow steadies CSK as Jamie Overton’s 4/18 seals a first Chepauk win in six outings against Delhi Capitals As an edge raced to the third man boundary, Sanju Samson pumped his fists, raised the bat, and brought out Rajinikanth’s Padayappa salute. Chepauk erupted in whistles. Off the field, it had been more than three weeks since Samson had said, “Thatarom, thookurom” — smash it, lift the cup — and the yellow faithful had been waiting for the innings that would make the promise feel real. It came on Sunday. Unbeaten on 115 off 56 deliveries. CSK’s fourth win at home, their first in six outings at Chepauk. The innings had its complications. CSK finished 212/2, which on this surface felt like a score left on the table. The powerplay gave them 61, the final four overs 41 — both below par. Ruturaj Gaikwad’s sedate start held them back through the first half. Samson himself didn’t hit a single six in the first ten overs. The first came off the …