Merge swagger-core 2.2.55 upgrade

Author: bnasslahsen

CHANGELOG.md

@@ -32,7 +32,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Document that the MCP approval flow is a confirmation step, not an authorization control
 - Document the security policy and the release versioning scheme
 - #3351 – `java.time.Duration`, `LocalTime` and `OffsetTime` are now resolved by swagger-core instead of being forced to a bare `string`, so they carry a `format` (`duration` and `partial-time` respectively for the first two)
-- Upgrade swagger-core to version **2.2.54**
+- A property whose type only implements `Set` indirectly (`LinkedHashSet`, `TreeSet`, …) is now described with `uniqueItems: true`, following [swagger-api/swagger-core#5265](https://github.com/swagger-api/swagger-core/pull/5265)
+- Upgrade swagger-core to version **2.2.55**
 - Upgrade swagger-ui to version **5.32.14**
 
 ### Fixed

pom.xml

@@ -59,7 +59,7 @@
 		<central-publishing-maven-plugin.version>0.11.0
 		</central-publishing-maven-plugin.version>
 		<flatten-maven-plugin.version>1.5.0</flatten-maven-plugin.version>
-		<swagger-api.version>2.2.54</swagger-api.version>
+		<swagger-api.version>2.2.55</swagger-api.version>
 		<swagger-ui.version>5.32.14</swagger-ui.version>
 		<gmavenplus-plugin.version>1.13.1</gmavenplus-plugin.version>
 		<jjwt.version>0.9.1</jjwt.version>

springdoc-openapi-tests/springdoc-openapi-kotlin-webmvc-tests/src/test/resources/results/3.1.0/app3.json

@@ -96,7 +96,8 @@
             "type": "array",
             "items": {
               "type": "string"
-            }
+            },
+            "uniqueItems": true
           }
         },
         "required": [