QUIC prototype

[End-rey]

No description provided.

[End-rey]

Benchmark tests were run on this branch against the 0.53 release. Throughput in ops/s.

REP3

Test	Size, KB	Threads	base	quic	Δ
PUT	4	1	235	236	+0%
PUT	4	4	694	704	+1%
PUT	4	16	998	1022	+2%
PUT	4096	1	89	90	+1%
PUT	4096	4	171	177	+4%
PUT	4096	16	210	211	+0%
GET	4	1	1477	1453	-2%
GET	4	4	2353	2321	-1%
GET	4	16	2877	2841	-1%
GET	4096	1	323	321	-1%
GET	4096	4	535	544	+2%
GET	4096	16	613	632	+3%

The only systematic signal is small-object GET at -1…-2% across all thread counts – a tiny, real transport
cost (userspace UDP + per-packet syscalls vs kernel TCP with offload). Everything else, including large-object
GET and all PUT rows, is within the test's margin of error, with no regression.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 328 lines in your changes missing coverage. Please review.
✅ Project coverage is 27.60%. Comparing base (3b4a1dd) to head (2c27025).

Files with missing lines	Patch %	Lines
pkg/services/object/server_quic.go	0.00%	214 Missing ⚠️
pkg/network/cache/clients.go	0.00%	45 Missing ⚠️
internal/qstream/qstream.go	0.00%	35 Missing ⚠️
cmd/neofs-node/quic.go	0.00%	33 Missing ⚠️
cmd/neofs-node/object.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4010      +/-   ##
==========================================
- Coverage   27.80%   27.60%   -0.21%     
==========================================
  Files         681      684       +3     
  Lines       46758    47086     +328     
==========================================
- Hits        13003    13000       -3     
- Misses      32517    32848     +331     
  Partials     1238     1238              

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