fix(deps): update protobuf to v4

| datasource | package                             | from   | to     |
| ---------- | ----------------------------------- | ------ | ------ |
| maven      | com.google.protobuf:protoc          | 3.25.4 | 4.27.3 |
| maven      | com.google.protobuf:protobuf-kotlin | 3.25.4 | 4.27.3 |
| maven      | com.google.protobuf:protobuf-java   | 3.25.4 | 4.27.3 |

Author: renovate[bot]

settings.gradle.kts

@@ -14,7 +14,7 @@ dependencyResolutionManagement {
       version("kotlin", "2.0.10")
       version("logback", "1.5.6")
       version("mutiny-clients", "3.14.0")
-      version("protobuf", "3.25.4")
+      version("protobuf", "4.27.3")
       version("quarkus", "3.13.0")
       version("rxjava", "3.1.8")
       version("rxkotlin", "3.0.1")