Add batch-llm module: 100,000 synthetic tickets classified by a ChatClient in a Spring Batch 6 chunk step with Resilience4j rate limiting and retry, skip-and-record for malformed JSON, restart after kill -9 in a second JVM, and a per-chunk cost ledger. The model is a deterministic simulated ChatModel; prices are configurable placeholders. No provider called.

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_017ic4b4VQVEJWetTT1dYzyJ

batch-llm/scripts/compare.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+# Same tickets, same fault plan: the crashed-and-resumed database must hold exactly the clean run's results.
+set -euo pipefail
+source "$(dirname "$0")/common.sh"
+{ echo "# Clean run vs crashed-and-resumed run"; echo
+  for f in target/clean/run.log target/crash/jvm2.log; do
+    echo "## $f"
+    grep -E "^tickets total|^ledger|results checksum|billed calls the ledger" "$f"
+    echo
+  done; } > output/10-compare.txt
+cat output/10-compare.txt
+a=$(grep checksum target/clean/run.log | awk '{print $NF}'); b=$(grep checksum target/crash/jvm2.log | awk '{print $NF}')
+[ "$a" = "$b" ] && echo "checksums identical: $a" | tee -a output/10-compare.txt || { echo "CHECKSUMS DIFFER $a $b" | tee -a output/10-compare.txt; exit 1; }