Fix NetworkTest loopback parsing failure on Windows

[Copilot]

On Windows, NetworkInterface.getDisplayName() may return values like "Software Loopback Interface 1" which Network.parseAddress() cannot resolve via NetworkInterface.getByName(). This causes NetworkTest to fail on Windows despite the interface being valid.

Changes

• NetworkTest.java: Wrap the parseAddress call using getDisplayName() in a try-catch; fall back to getName() (e.g., "lo") if parsing fails.

try {
    addr = Network.parseAddress("[ff02::42:1]:5099@" + lo.getDisplayName(), PVASettings.EPICS_PVA_BROADCAST_PORT);
} catch (Exception ex) {
    addr = Network.parseAddress("[ff02::42:1]:5099@" + lo.getName(), PVASettings.EPICS_PVA_BROADCAST_PORT);
}

• Fixes Fix the core-pva NetworkTest #3902

[sonarqubecloud]

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