Use mdc-attributes.included instead of deprecated capture-mdc-attributes (#4893)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: rajkumar-rangaraj

CHANGELOG.md

@@ -2,6 +2,12 @@
 
 ## Unreleased
 
+### Bug fixes
+
+* Fix startup deprecation warning for `capture-mdc-attributes` by using the replacement
+  `mdc-attributes.included` properties
+  ([#4893](https://github.com/microsoft/ApplicationInsights-Java/pull/4893))
+
 ## Version 3.7.10 GA (09/17/2026)
 
 ### Enhancements

agent/agent-tooling/src/main/java/com/microsoft/applicationinsights/agent/internal/init/AiConfigCustomizer.java

@@ -66,12 +66,11 @@ public Map<String, String> apply(ConfigProperties otelConfig) {
 
     // enable capturing all mdc properties
     properties.put(
-        "otel.instrumentation.logback-appender.experimental.capture-mdc-attributes", "*");
-    properties.put("otel.instrumentation.log4j-appender.experimental.capture-mdc-attributes", "*");
+        "otel.instrumentation.logback-appender.experimental.mdc-attributes.included", "*");
+    // for log4j, this covers both MDC and context data
+    properties.put("otel.instrumentation.log4j-appender.experimental.mdc-attributes.included", "*");
     properties.put(
-        "otel.instrumentation.log4j-appender.experimental.capture-context-data-attributes", "*");
-    properties.put(
-        "otel.instrumentation.jboss-logmanager.experimental.capture-mdc-attributes", "*");
+        "otel.instrumentation.jboss-logmanager.experimental.mdc-attributes.included", "*");
 
     properties.put(
         "otel.instrumentation.log4j-appender.experimental.capture-map-message-attributes", "true");