fix(network): exclude initial ws neighbors for parallel operations

[juslesan]

Summary

As we run parallel handshaking algorithms now it makes sense to push the WS node to the excluded list immediately. This way the same WS server cannot be picked

Future improvements

Explore more general exclusion in general. Parallel handshaking operations can be done to the same nodes. Naively pushing attempted handshakes to the exclude list breaks some tests.

[juslesan]

900 runs:

-------------------------------
Time to start network stack
mean: 372.1355555555556
median: 292.5
max: 3434
min: 147
std: 461.71627586914144
-------------------------------
Time to fetch stream entry points
mean: 103.43487858719647
median: 80
max: 5140
min: 9
std: 215.12270398084817
-------------------------------
Time to first neighbor
mean: 794.460511679644
median: 429
max: 17402
min: 216
std: 1311.6120511801776
-------------------------------
Time to first message in network
mean: 854.8622222222223
median: 499.5
max: 17422
min: 221
std: 1317.7143464328915
-------------------------------
Time to validate
mean: 977.94
median: 566
max: 13609
min: 437
std: 1415.094531887456
-------------------------------
Time to first message
mean: 2493.6566666666668
median: 1771.5
max: 18558
min: 1142
std: 1945.860233335832