[Ayush8923]

Issue

Closes #1230

Summary

• Added POST /chatbot/message, stateless chatbot endpoint; caller sends full message history each turn, gets back the updated transcript
• Built ChatbotEngine using LangGraph + LangChain (ChatAnthropic), single-node graph handles one conversation turn
• Added token-based history summarization: when history exceeds the token budget, older turns are compressed into a summary note before the model call
• Wired chatbot model settings to existing Kaapi config system (config_id + optional config_version) so model, max tokens, and reasoning effort come from saved configs
• Added langchain-anthropic dependency
• Added two Alembic seed migrations (086, 087) for Anthropic text model configs
• Added wiki docs for the chatbot module

Checklist

Before submitting a pull request, please ensure that you mark these task.

• Ran fastapi run --reload app/main.py or docker compose up in the repository root and test.
• If you've fixed a bug or added code that is tested and has test cases.

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[github-actions]

OpenAPI changes   🟢 1 non-breaking change

Tip

Safe to merge from an API-contract perspective.

Full changelog  ·  1

	Method	Path	Change
🟢	POST	/api/v1/chatbot/message	endpoint added

_{main ↔ 2527441e · generated by oasdiff}

[codecov]

Codecov Report

❌ Patch coverage is 46.44550% with 113 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
backend/app/services/chatbot/engine.py	24.09%	63 Missing ⚠️
backend/app/services/chatbot/config.py	35.71%	27 Missing ⚠️
backend/app/api/routes/chatbot/message.py	44.00%	14 Missing ⚠️
backend/app/services/chatbot/utils.py	72.00%	7 Missing ⚠️
backend/app/crud/config/version.py	33.33%	2 Missing ⚠️

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