network: handle p2p addr expiration in ReplacePeerList

[algorandskiy]

Summary

Some p2p nodes report the following

{
    "file": "p2p.go",
    "function": "github.com/algorand/go-algorand/network/p2p.(*serviceImpl).DialPeersUntilTargetCount",
    "level": "warning",
    "line": 322,
    "msg": "failed to connect to peer 12D3KooWRAqPqP9fb4Y3MoSuReXt6DfZeKgmUnb8vW1pKiVz8VjB: failed to dial: failed to dial 12D3KooWRAqPqP9fb4Y3MoSuReXt6DfZeKgmUnb8vW1pKiVz8VjB: no addresses",
    "name": "",
    "time": "2025-12-16T18:11:14.290014Z"
}

That is an indication of missing address component in AddrInfo data struct representing peerstore peer entry.

Cause: peerstore adds peers with AddressTTL expiration TTL, and then ReplacePeerList updates it without refreshing addresses. libp2p will expire addresses in background but preserve peerID (see https://github.com/libp2p/go-libp2p/blob/master/p2p/host/peerstore/pstoremem/addr_book.go#L54).

To fix, call AddAddrs on update.

Test Plan

Added a unit test checking ReplacePeerList stores addresses after a simulated expiration.

[codecov]

Codecov Report

❌ Patch coverage is 33.33333% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 47.69%. Comparing base (6ee2e7c) to head (dc0d476).
⚠️ Report is 2 commits behind head on master.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
network/p2p/peerstore/peerstore.go	33.33%	2 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6518      +/-   ##
==========================================
- Coverage   47.87%   47.69%   -0.19%     
==========================================
  Files         662      655       -7     
  Lines       87934    87855      -79     
==========================================
- Hits        42095    41899     -196     
- Misses      43076    43181     +105     
- Partials     2763     2775      +12     

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