Mini256

Refactor: using Python as backend

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### TODO - [x] Support multiple user roles (admin / user / anonymous) - [x] Metadata Filter

### Datasources - [x] Upload File - [x] PDF format - [ ] https://github.com/pingcap/autoflow/issues/343 - [x] Website - [x] single URL - [x] Sitemap #194 - [ ] S3 #222...

Support different models

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### LLM Models / Services - [x] ChatGLM3 #182 - [ ] Bedrock #181 - [ ] Ollama #157 - [ ] xinference ### Embedding Models / Services - [...

hold

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**What problem does this PR solve?** Issue Number: close #xxx Problem Summary: **What is changed and how it works?**

The default `create_foreign_key` / `drop_constraint` method doesn't gernated constraint name by alembic, it may result in alembic drop all the foreign keys on table when downgrade migration version, eventually leading...

Support TiDB Vector Store

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## Description Add TiDB Vector Store ## Type of change - [x] New feature (non-breaking change which adds functionality) ## How Has This Been Tested? - [x] Test Script (https://github.com/Mini256/tidb-mem0-demo)...

BedrockConverse usage is not compatible with langfuse

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2025-04-30 10:04:41,936 - langfuse:2747 - ERROR - Usage object must have either {input, output, total, unit} or {promptTokens, completionTokens, totalTokens}

- Wait for Ollama support `enable_thinking` flag to disable thinking model (see: https://github.com/ollama/ollama/issues/10492)