chore(sonar): add .sonarcloud.properties (#293)

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

Author: nanotaboada

.sonarcloud.properties

@@ -0,0 +1,60 @@
+# =============================================================================
+# SonarCloud Automatic Analysis configuration
+# https://docs.sonarsource.com/sonarqube-cloud/advanced-setup/automatic-analysis/
+#
+# SonarCloud's automatic analysis (GitHub App, no CI workflow) reads THIS file.
+# Wildcard patterns are NOT supported here, so all exclusion paths must be
+# listed explicitly.
+# =============================================================================
+
+sonar.projectKey=nanotaboada_java.samples.spring.boot
+sonar.organization=nanotaboada
+sonar.projectName=java.samples.spring.boot
+
+sonar.sources=src/main/java/
+sonar.tests=src/test/java/
+sonar.java.binaries=target/classes/
+sonar.sourceEncoding=UTF-8
+
+# =============================================================================
+# Global exclusions
+# Models and converters are infrastructure/boilerplate; excluded from analysis.
+# =============================================================================
+
+sonar.exclusions=\
+  src/main/java/ar/com/nanotaboada/java/samples/spring/boot/models/Player.java,\
+  src/main/java/ar/com/nanotaboada/java/samples/spring/boot/models/PlayerDTO.java,\
+  src/main/java/ar/com/nanotaboada/java/samples/spring/boot/converters/IsoDateConverter.java,\
+  src/main/java/ar/com/nanotaboada/java/samples/spring/boot/Application.java
+
+# =============================================================================
+# Coverage exclusions
+# Mirrors codecov.yml ignore list — focus on controllers/, services/,
+# repositories/
+# =============================================================================
+
+sonar.coverage.exclusions=\
+  src/test/java/ar/com/nanotaboada/java/samples/spring/boot/test/controllers/PlayersControllerTests.java,\
+  src/test/java/ar/com/nanotaboada/java/samples/spring/boot/test/PlayerDTOFakes.java,\
+  src/test/java/ar/com/nanotaboada/java/samples/spring/boot/test/PlayerFakes.java,\
+  src/test/java/ar/com/nanotaboada/java/samples/spring/boot/test/repositories/PlayersRepositoryTests.java,\
+  src/test/java/ar/com/nanotaboada/java/samples/spring/boot/test/services/PlayersServiceTests.java,\
+  src/main/java/ar/com/nanotaboada/java/samples/spring/boot/models/Player.java,\
+  src/main/java/ar/com/nanotaboada/java/samples/spring/boot/models/PlayerDTO.java,\
+  src/main/java/ar/com/nanotaboada/java/samples/spring/boot/converters/IsoDateConverter.java,\
+  src/main/java/ar/com/nanotaboada/java/samples/spring/boot/Application.java
+
+# =============================================================================
+# Duplicate code (CPD) exclusions
+# Automatic analysis does not support wildcard patterns, so each file is
+# listed explicitly.
+#
+# Player.java and PlayerDTO.java — entity and DTO mirror each other by design.
+# Test fakes — PlayerFakes and PlayerDTOFakes are intentionally parallel.
+# =============================================================================
+
+sonar.cpd.exclusions=\
+  src/main/java/ar/com/nanotaboada/java/samples/spring/boot/models/Player.java,\
+  src/main/java/ar/com/nanotaboada/java/samples/spring/boot/models/PlayerDTO.java,\
+  src/test/java/ar/com/nanotaboada/java/samples/spring/boot/test/PlayerFakes.java,\
+  src/test/java/ar/com/nanotaboada/java/samples/spring/boot/test/PlayerDTOFakes.java

CHANGELOG.md

@@ -40,6 +40,13 @@ Release names follow the **historic football clubs** naming convention (A–Z):
 
 ## [Unreleased]
 
+### Added
+
+- `.sonarcloud.properties`: SonarCloud Automatic Analysis configuration —
+  sources, tests, coverage exclusions aligned with `codecov.yml` (#293)
+- `.dockerignore`: added `.claude/`, `CLAUDE.md`, `.coderabbit.yaml`,
+  `.sonarcloud.properties`, `CHANGELOG.md`, `README.md` (#293)
+
 ---
 
 ## [1.0.0 - Arsenal] - 2026-03-29