fix: Capture diagnostics from Quarkus JVM instead of Maven parent

Problem:
- Thread/heap dumps were capturing Maven parent process (quarkus:dev)
- This showed only 12 JVM internal threads, missing actual application

Solution:
- Changed pgrep pattern from "quarkus:dev" to "a2a-tck-server-dev.jar"
- This targets the actual Quarkus application JVM child process
- Added debug output to show available Java processes if not found

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: kabir

.github/workflows/run-tck.yml

@@ -104,24 +104,27 @@ jobs:
       - name: Capture Thread Dump
         if: always()
         run: |
-          # Get PID of Quarkus process
-          QUARKUS_PID=$(pgrep -f "quarkus:dev" || echo "")
+          # Find the actual Quarkus JVM (child of Maven process), not the Maven parent
+          # Look for the dev.jar process which is the actual application
+          QUARKUS_PID=$(pgrep -f "a2a-tck-server-dev.jar" || echo "")
           if [ -n "$QUARKUS_PID" ]; then
-            echo "📊 Capturing thread dump for PID $QUARKUS_PID"
+            echo "📊 Capturing thread dump for Quarkus JVM PID $QUARKUS_PID"
             jstack $QUARKUS_PID > tck/target/thread-dump.txt || echo "Failed to capture thread dump"
             if [ -f tck/target/thread-dump.txt ]; then
               echo "✅ Thread dump captured ($(wc -l < tck/target/thread-dump.txt) lines)"
             fi
           else
-            echo "⚠️ No Quarkus process found for thread dump"
+            echo "⚠️ No Quarkus JVM process found for thread dump"
+            echo "Available Java processes:"
+            ps aux | grep java || true
           fi
       - name: Capture Heap Dump
         if: always()
         run: |
-          # Get PID of Quarkus process
-          QUARKUS_PID=$(pgrep -f "quarkus:dev" || echo "")
+          # Find the actual Quarkus JVM (child of Maven process), not the Maven parent
+          QUARKUS_PID=$(pgrep -f "a2a-tck-server-dev.jar" || echo "")
           if [ -n "$QUARKUS_PID" ]; then
-            echo "📊 Capturing heap dump for PID $QUARKUS_PID"
+            echo "📊 Capturing heap dump for Quarkus JVM PID $QUARKUS_PID"
             jmap -dump:live,format=b,file=tck/target/heap-dump.hprof $QUARKUS_PID || echo "Failed to capture heap dump"
             if [ -f tck/target/heap-dump.hprof ]; then
               SIZE=$(du -h tck/target/heap-dump.hprof | cut -f1)
@@ -132,7 +135,9 @@ jobs:
               echo "✅ Compressed heap dump ($COMPRESSED_SIZE)"
             fi
           else
-            echo "⚠️ No Quarkus process found for heap dump"
+            echo "⚠️ No Quarkus JVM process found for heap dump"
+            echo "Available Java processes:"
+            ps aux | grep java || true
           fi
       - name: Stop Quarkus Server
         if: always()