ci(kotlin): narrow ADO verify check to generated/ to avoid NOTICE.txt drift (#175)

The ESRP-backed maven-package template drops files like NOTICE.txt into clients/kotlin during the publish flow. The previous broad `git status --porcelain -- clients/kotlin` check would catch these as untracked files (`?? clients/kotlin/NOTICE.txt`) and fail the build with a misleading 'Generated Kotlin sources are out of date' error.

Narrow the check to the generated/ subdirectory, where `npm run generate:kotlin` actually writes its output. Matches the same fix applied to clients/typescript/pipeline.yml in #174.

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

Author: connor4312

clients/kotlin/pipeline.yml

@@ -107,10 +107,16 @@ extends:
 
       - bash: |
           set -euo pipefail
-          if [ -n "$(git status --porcelain -- clients/kotlin)" ]; then
+          # Narrow path filter: only the generated/ subdir, not all of
+          # clients/kotlin. The ADO maven-package template drops files
+          # like NOTICE.txt into clients/kotlin during the publish step,
+          # which a broad check would mistake for stale generated source
+          # drift. Matches the GHA ci.yml pattern.
+          GENERATED_DIR=clients/kotlin/src/main/kotlin/com/microsoft/agenthostprotocol/generated
+          if [ -n "$(git status --porcelain -- $GENERATED_DIR)" ]; then
             echo "##vso[task.logissue type=error]Generated Kotlin sources are out of date. Run 'npm run generate:kotlin' and commit the result."
-            git status --porcelain -- clients/kotlin
-            git --no-pager diff -- clients/kotlin
+            git status --porcelain -- $GENERATED_DIR
+            git --no-pager diff -- $GENERATED_DIR
             exit 1
           fi
         displayName: ✅ Verify generated Kotlin is up to date