Force slf4j bridges to 2.x in ActuatorMetricsSpringBoot4

The ai.smoke-test convention forces log4j-over-slf4j, jcl-over-slf4j,
and jul-to-slf4j to 1.7.36. Spring Boot 4 can transitively pull these
bridges, leaving them binary-incompatible with the slf4j-api 2.0.17
this module already forces. Re-force the bridges to 2.0.17 to match.

Author: trask

smoke-tests/apps/ActuatorMetricsSpringBoot4/build.gradle.kts

@@ -6,15 +6,20 @@ plugins {
 }
 
 // The ai.smoke-test convention plugin applies `resolutionStrategy.force` on every
-// configuration to pin logback-classic to 1.2.12 and slf4j-api to 1.7.36 (needed by the
-// older Spring Boot smoke-test apps). Spring Boot 4 requires logback 1.5.x and slf4j 2.x
+// configuration to pin logback-classic to 1.2.12 and the slf4j bridges (slf4j-api,
+// log4j-over-slf4j, jcl-over-slf4j, jul-to-slf4j) to 1.7.36 (needed by the older
+// Spring Boot smoke-test apps). Spring Boot 4 requires logback 1.5.x and slf4j 2.x
 // and fails at startup with AbstractMethodError against SB4's RootLogLevelConfigurator
-// otherwise. Re-force the newer versions here to override the convention's force.
+// otherwise. Re-force the newer versions here to override the convention's force,
+// including all slf4j bridges so they stay binary-compatible with slf4j-api 2.x.
 configurations.configureEach {
   resolutionStrategy.force(
     "ch.qos.logback:logback-classic:1.5.21",
     "ch.qos.logback:logback-core:1.5.21",
-    "org.slf4j:slf4j-api:2.0.17"
+    "org.slf4j:slf4j-api:2.0.17",
+    "org.slf4j:log4j-over-slf4j:2.0.17",
+    "org.slf4j:jcl-over-slf4j:2.0.17",
+    "org.slf4j:jul-to-slf4j:2.0.17"
   )
 }