core(routing): seqno request log spam

[encodeous]

If we remove the addr 10.1.0.2 on ct2 via a config reload, the other nodes will keep trying to request the seqno

ct4  | DBG ct4 requested seqno module=router event=seqno_requested src.router=ct2 src.prefix=10.1.0.2/32 seqno=1
ct1  | DBG ct1 requested seqno module=router event=seqno_requested src.router=ct2 src.prefix=10.1.0.2/32 seqno=1
ct3  | DBG ct3 requested seqno module=router event=seqno_requested src.router=ct2 src.prefix=10.1.0.2/32 seqno=1
ct4  | DBG ct4 requested seqno module=router event=seqno_requested src.router=ct2 src.prefix=10.1.0.2/32 seqno=1
ct1  | DBG ct1 requested seqno module=router event=seqno_requested src.router=ct2 src.prefix=10.1.0.2/32 seqno=1
ct3  | DBG ct3 requested seqno module=router event=seqno_requested src.router=ct2 src.prefix=10.1.0.2/32 seqno=1
...