fix(deps): update all dependencies to v4

| datasource | package                          | from  | to    |
| ---------- | -------------------------------- | ----- | ----- |
| maven      | org.apache.kafka:kafka-streams   | 3.7.0 | 4.0.0 |
| maven      | org.apache.kafka:kafka-clients   | 3.7.0 | 4.0.0 |
| maven      | org.apache.kafka:connect-runtime | 3.7.0 | 4.0.0 |

Author: renovate[bot]

gradle/libs.versions.toml

@@ -1,6 +1,6 @@
 [versions]
 kotest = "5.8.1"
-kafka = "3.7.0"
+kafka = "4.0.0"
 kotlin = "2.0.0-RC2"
 kotlinx-coroutines = "1.8.0"
 dokka = "2.0.0"