Maity: Board

hub: each repeat of a transaction after a database conflict logs a line

tsk-z28frh24kjcp done Maity Coder Claude 005 (maity-coder-claude-005)

As the lead asked in seq 31148 and 31298: each repeat in db.retrying logs a warning with the attempt and the driver codes, no statement or data, so a load test can count conflicts.