[Feat] Make the connection stats ephemeral

[ljedrz]

This PR removes the persistent KnownPeers in favor of the Stats (the same as those of Tcp), which live for as long as the associated object (in this case the connection).

There are several benefits to this approach:

• stats for multiple connections per IP can now be distinguished
• the values can be used more reliably for peer heuristics (CC [Proposal] Introduce additional node hardening measures #4140)
• no more lock contention for traffic accounting
• peers changing their hardware or internet connection won't be affected by past failures

If we're interested in tracking long-term peer reputation, this should be done at the Peer (i.e. higher) level, and based on their Address.

[veria-ai]

PR overview

All previously flagged issues have been addressed. No open security concerns remain on this pull request.

Security review

No open security issues remain on this pull request.

Fixed/addressed: 1 · PR risk: 0/10

[cbeck88]

this looks good to me, thaank you

[vicsn]

Can you tackle CI in a separate PR? Maybe we need a bigger machine?

error: could not compile `snarkvm-ledger-puzzle-epoch` (lib)

Caused by:
  process didn't exit successfully: `/home/circleci/.rustup/toolchains/1.88-x86_64-unknown-linux-gnu/bin/rustc --crate-name snarkvm_ledger_puzzle_epoch --edition=2024 /home/circleci/.cargo/git/checkouts/snarkvm-cca64a3992502984/79949e1/ledger/puzzle/epoch/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C opt-level=2 -C lto=off -C embed-bitcode=no -C debuginfo=2 -C debug-assertions=on --cfg 'feature="aleo-std"' --cfg 'feature="default"' --cfg 'feature="lru"' --cfg 'feature="parking_lot"' --cfg 'feature="rayon"' --cfg 'feature="snarkvm-circuit"' --cfg 'feature="snarkvm-synthesizer-process"' --cfg 'feature="snarkvm-synthesizer-program"' --cfg 'feature="synthesis"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("aleo-std", "default", "dev-print", "locktick", "lru", "merkle", "parking_lot", "rayon", "serial", "snarkvm-circuit", "snarkvm-synthesizer-process", "snarkvm-synthesizer-program", "synthesis", "timer", "wasm"))' -C metadata=35b3278aa17e74ab -C extra-filename=-80db91d8254757aa --out-dir /home/circleci/project/target/debug/deps -L dependency=/home/circleci/project/target/debug/deps --extern aleo_std=/home/circleci/project/target/debug/deps/libaleo_std-41342ee45f0660b9.rmeta --extern anyhow=/home/circleci/project/target/debug/deps/libanyhow-c844f5079120e8e5.rmeta --extern colored=/home/circleci/project/target/debug/deps/libcolored-129e2a66d025471e.rmeta --extern indexmap=/home/circleci/project/target/debug/deps/libindexmap-2d59ca0672d5a81d.rmeta --extern lru=/home/circleci/project/target/debug/deps/liblru-eab74573c44b560f.rmeta --extern parking_lot=/home/circleci/project/target/debug/deps/libparking_lot-acb41200195e9ca5.rmeta --extern rand=/home/circleci/project/target/debug/deps/librand-fb5ba73f500e5bd4.rmeta --extern rand_chacha=/home/circleci/project/target/debug/deps/librand_chacha-b3f5fe9b4c6094c5.rmeta --extern rayon=/home/circleci/project/target/debug/deps/librayon-f19e320dcd3581ca.rmeta --extern snarkvm_circuit=/home/circleci/project/target/debug/deps/libsnarkvm_circuit-41fa427bdc51069a.rmeta --extern snarkvm_console=/home/circleci/project/target/debug/deps/libsnarkvm_console-a15d6f94ead752b4.rmeta --extern snarkvm_ledger_puzzle=/home/circleci/project/target/debug/deps/libsnarkvm_ledger_puzzle-a1cf18e4a0808408.rmeta --extern snarkvm_synthesizer_process=/home/circleci/project/target/debug/deps/libsnarkvm_synthesizer_process-c97387c2d2723198.rmeta --extern snarkvm_synthesizer_program=/home/circleci/project/target/debug/deps/libsnarkvm_synthesizer_program-af6802fc2d8c5484.rmeta --extern snarkvm_utilities=/home/circleci/project/target/debug/deps/libsnarkvm_utilities-80edb15e92266f50.rmeta --cap-lints allow -C link-arg=-fuse-ld=lld -C target-cpu=skylake -L native=/home/circleci/project/target/debug/build/aws-lc-sys-6ff73797cb8cc3aa/out -L native=/home/circleci/project/target/debug/build/ring-5f0e48dc64037e34/out` (signal: 9, SIGKILL: kill)

[ljedrz]

I'm already on it: #4386.