add payload to LocationAwareKLogger

Author: oshai

src/javaMain/kotlin/io/github/oshai/kotlinlogging/slf4j/internal/LocationAwareKLogger.kt

@@ -10,6 +10,7 @@ import io.github.oshai.kotlinlogging.slf4j.isLoggingEnabledFor
 import io.github.oshai.kotlinlogging.slf4j.toSlf4j
 import org.slf4j.event.EventConstants
 import org.slf4j.helpers.MessageFormatter
+import org.slf4j.spi.CallerBoundaryAware
 import org.slf4j.spi.LocationAwareLogger
 
 /**
@@ -35,7 +36,14 @@ internal class LocationAwareKLogger(override val underlyingLogger: LocationAware
   override fun at(level: Level, marker: Marker?, block: KLoggingEventBuilder.() -> Unit) {
     if (isLoggingEnabledFor(level, marker)) {
       KLoggingEventBuilder().apply(block).run {
-        underlyingLogger.log(marker?.toSlf4j(), fqcn, level.toSlf4j().toInt(), message, null, cause)
+        val builder = underlyingLogger.atLevel(level.toSlf4j())
+        marker?.toSlf4j()?.let { builder.addMarker(it) }
+        payload?.forEach { (key, value) -> builder.addKeyValue(key, value) }
+        builder.setCause(cause)
+        if (builder is CallerBoundaryAware) {
+          builder.setCallerBoundary(fqcn)
+        }
+        builder.log(message)
       }
     }
   }