p2p: remove noisy QUIC happy-path debug logs

[KaloyanTanev]

Remove two debug log lines from forceQUICConn that fire every minute on the happy path, producing unnecessary noise:

• "QUIC feature not enabled on this node" — logged every tick when QUIC is disabled; the feature state is already visible in the startup config.
• "Direct QUIC connection to peer already established" — logged every tick per peer when QUIC is healthy; steady state doesn't need logging, only transitions do.

category: refactor
ticket: none

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 58.26%. Comparing base (4a69578) to head (a8c0fc1).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4645   +/-   ##
=======================================
  Coverage   58.25%   58.26%           
=======================================
  Files         247      247           
  Lines       34087    34085    -2     
=======================================
  Hits        19858    19858           
+ Misses      11761    11756    -5     
- Partials     2468     2471    +3     

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