chore(sonar): remove unsupported sonar.sources and sonar.tests properties (#459)

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: nanotaboada

.sonarcloud.properties

@@ -7,8 +7,9 @@
 # listed explicitly.
 # =============================================================================
 
-sonar.sources=src/
-sonar.tests=test/
+# NOTE: sonar.sources and sonar.tests are NOT supported by the Scanner for .NET
+# and are silently ignored. The scanner auto-discovers sources and test projects
+# from .csproj files. Do not add them back.
 sonar.sourceEncoding=UTF-8
 
 # =============================================================================