Jumbo in the size mix (MTU 9000 + module jumbo pinned), check-first module config trusting GET reads, cable diag async at startup through the reset path, MODULES table dissolved into SETTINGS/LINKS, per-driver NIC counter sets, comment cleanup

ts.go

@@ -18,10 +18,8 @@ type hwtstampConfig struct {
 	rxFilter int32
 }
 
-// Temporarily bypassed rather than fatal: the X520 bench card cannot stamp
-// all packets, and the BCM diagnostics path needs runs now. Without stamps
-// the rate buckets never fill, so the panel's rates read zero; everything
-// else still measures.
+// Temporarily bypassed so BCM work can run on the X520, which cannot stamp;
+// restore to fatal for the product NIC (docs/open-questions.md).
 func checkTimestamping(fd int, ifname string) checkResult {
 	res := configureTimestamping(fd, ifname)
 	if res.err != nil {