A REGULAR ARRIVAL This isn't a first for Bernard Tinivella. He's already had a stand. Several, even. In Serpette, in particular, where he started nearly 30 years ago in aisle 6. Last October, he reopened at this market, which he left in 2003 but never lost sight of. This time, Bernard Tinivella is making a place for himself in Paul Bert, aisle 4. A few faces have changed, but the spirit remains the same: that of a large family always happy to expand, especially when his elders return to sit down and settle down for good. He's welcomed, teased, and asked for advice. And Bernard feels back at home.