Debug logging should be opt-in rather than opt-out

[jr01]

First, thank you for this excellent library! We're close to using Infidex for knowledge base search in production 😄

Issue
The FusionScorer class (and possibly other internal classes) has a static field EnableDebugLogging that defaults to true, causing verbose debug output to be written directly to Console.WriteLine during search operations. This pollutes application logs.

Expected behavior
Debug logging should be opt-in rather than opt-out.

Suggestion
Many .NET libraries follow the convention that diagnostic output should be opt-in or integrate with the host application's logging system (e.g., via ILogger<T> or Microsoft.Extensions.Logging). Direct Console.WriteLine calls bypass log filtering, structured logging, and log routing.

Current workaround

var fusionScorerType = Type.GetType("Infidex.Scoring.FusionScorer, Infidex");
var field = fusionScorerType?.GetField("EnableDebugLogging", BindingFlags.Static | BindingFlags.NonPublic);
field?.SetValue(null, false);

Environment: Infidex 1.0.8, .NET 10

[lofcz]

Hey, I will be looking into this today.