In config_transaction(), when both PRECISE_CHECKPOINT and OPS_PREPARE are enabled, the code disables ops.truncate because prepared truncate operations are not yet supported (see FIXME-WT-15565).

The previous call used config_off(NULL, "ops.truncate"), which only disables the option on the global (NULL/table-0) configuration. In multi-table format runs, per-table configurations were left untouched, meaning truncate could still be enabled on individual tables — potentially triggering the unsupported code path.

Fix: replace with config_off_all("ops.truncate"), which disables the option on all tables (global + each per-table config), matching the pattern used elsewhere in the file for table-wide restrictions.