chore(sonar): add Migrations and DbContext to CPD exclusions (#435)

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

Author: nanotaboada

sonar-project.properties

@@ -47,6 +47,14 @@ sonar.coverage.exclusions=\
 # hotspots) but has no effect on CPD metrics. Files must be listed here to be
 # excluded from duplicate code detection.
 #
+# **/Migrations/**  — EF Core migration files are intentionally repetitive
+#   (sequential InsertData/UpdateData/Sql calls); must be listed explicitly
+#   here even though already present in sonar.exclusions, as CPD is evaluated
+#   independently of the global exclusion list.
+#
+# **/Data/PlayerDbContext.cs — scaffolded EF Core infrastructure; excluded
+#   from coverage metrics above for the same reason.
+#
 # test/**/*.cs — Fakes, Mocks, and Stubs are intentionally repetitive by
 #   design; similarity between arrange/act/assert blocks across tests is
 #   expected and harmless.
@@ -57,5 +65,7 @@ sonar.coverage.exclusions=\
 # =============================================================================
 
 sonar.cpd.exclusions=\
+  **/Migrations/**,\
+  **/Data/PlayerDbContext.cs,\
   test/**/*.cs,\
   **/Validators/PlayerRequestModelValidator.cs