chore: add tx metrics and logs for serialization errors (#15215)

Before db_metrics were all or nothing. Now `InTx` metrics are always recorded, and query metrics are opt in.


Adds instrumentation & logging around serialization failures in the database.

coderd/database/dbrollup/dbrollup.go

@@ -108,7 +108,7 @@ func (r *Rolluper) start(ctx context.Context) {
 
 				ev.TemplateUsageStats = true
 				return tx.UpsertTemplateUsageStats(ctx)
-			}, nil)
+			}, database.DefaultTXOptions().WithID("db_rollup"))
 		})
 
 		err := eg.Wait()