Add koog module: a tool-calling agent, a strategy graph with a Java node and the Spring Boot starter on Koog 1.3.0, tested against a scripted OpenAI-compatible endpoint

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_017ic4b6FHj1ptP5Fej2eFDo

koog/output/03-failure-modes.txt

@@ -0,0 +1,17 @@
+1. The tool throws IllegalArgumentException("Unknown service: nope")
+   agent.run returned: There is no such service.
+   LLM calls: 2
+   what the model was told: tool: Tool with name 'getServiceStatus' failed to execute due to the error: Unknown service: nope!
+
+2. The model sends {"minutes":"soon"} for an int parameter
+   what the model was told: Tool with name 'error_rate' failed to parse arguments due to the error: Failed to parse literal '"soon"' as an int value at element: $.primitive | JSON input: "soon"
+
+3. The model calls restartService, which is not registered
+   the history sent back, last two messages:
+     {"role":"assistant","content":"{\"tool_call_id\":\"c1\",\"tool_name\":\"restartService\",\"tool_args\":{\"service\":\"checkout\"}}"}
+     {"role":"user","content":"{\"tool_call_id\":\"c1\",\"tool_name\":\"restartService\",\"tool_result\":\"Tool with name 'restartService' not found in the tool registry. Use one of the available tools.\"}"}
+
+4. The model answers every request with another tool call, maxIterations(6)
+   AIAgentMaxNumberOfIterationsReachedException
+   LLM calls made before it stopped: 3
+   default maxIterations of an agent you do not configure: 50