Add langgraph4j module: a loan-approval graph with checkpoints and human-in-the-loop on LangGraph4j 1.9.5

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01RjfyTgmERTWLqzafu34Cth

README.md

@@ -10,6 +10,7 @@ facts, so the build fails when a claim stops being true.
 | `a2a` | A2A Protocol in Java: Agents That Talk to Each Other | agent card, tasks, streaming, input-required and agent-to-agent calls with the A2A Java SDK |
 | `onnx-djl` | Running ONNX Models in Java with ONNX Runtime and DJL | a DistilBERT sentiment model: DJL tokenizer, ONNX Runtime directly and through DJL's engine, batching, and a Spring Boot endpoint with latency numbers |
 | `jlama` | Local LLM Inference in Pure Java with Jlama | load and run a 4-bit TinyLlama inside the JVM on the Vector API, tokens per second, streaming, and the same measurement against Ollama |
+| `langgraph4j` | LangGraph4j: Stateful Agent Graphs in Java | a loan-approval graph with conditional edges, checkpoints, a human-in-the-loop pause and resume, and the `releaseThread` default that erases a finished run |
 
 ## Versions (verified on Maven Central, 2026-10-11)
 
@@ -23,6 +24,7 @@ facts, so the build fails when a claim stops being true.
 | DJL (`ai.djl`) | 0.38.0 | `api`, `huggingface:tokenizers`, `onnxruntime:onnxruntime-engine` |
 | Spring Boot | 4.1.1 | `onnx-djl` endpoint only |
 | Model | `distilbert/distilbert-base-uncased-finetuned-sst-2-english` | `onnx/model.onnx` (268 MB), `onnx/tokenizer.json`, `config.json` in `onnx-djl/models/sst2/` (git-ignored) |
+| LangGraph4j `org.bsc.langgraph4j:langgraph4j-core` | 1.9.5 | verified on Maven Central 2026-10-14; `langgraph4j` module only |
 | JDK | 25 LTS | |
 | JUnit | 6.1.3 | |