ci(sonar): exclude validator from CPD to suppress intentional duplication

The "Create" and "Update" rule sets in PlayerRequestModelValidator share
common rules by design; each operation's validation is intentionally kept
self-contained for readability. // NOSONAR only suppresses rule-based
issues and has no effect on CPD metrics, so the file is listed under
sonar.cpd.exclusions instead.

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

Author: nanotaboada

sonar-project.properties

@@ -43,9 +43,19 @@ sonar.coverage.exclusions=\
 
 # =============================================================================
 # Duplicate code (CPD) exclusions
-# Test utilities (Fakes, Mocks, Stubs) are intentionally repetitive by design:
-# each operation gets its own factory method and the similarity between
-# arrange/act/assert blocks across tests is expected and harmless.
+# NOTE: // NOSONAR suppresses rule-based issues (bugs, code smells, security
+# hotspots) but has no effect on CPD metrics. Files must be listed here to be
+# excluded from duplicate code detection.
+#
+# test/**/*.cs — Fakes, Mocks, and Stubs are intentionally repetitive by
+#   design; similarity between arrange/act/assert blocks across tests is
+#   expected and harmless.
+#
+# **/Validators/PlayerRequestModelValidator.cs — the "Create" and "Update"
+#   rule sets share common rules by design; the duplication is intentional to
+#   keep each operation's validation self-contained and readable.
 # =============================================================================
 
-sonar.cpd.exclusions=test/**/*.cs
+sonar.cpd.exclusions=\
+  test/**/*.cs,\
+  **/Validators/PlayerRequestModelValidator.cs