feat: Add adbpg tool model and endpoint

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Plugin Submission Form

1. Metadata

• Plugin Author: aliyun-adbpg-team
• Plugin Name: AnalyticDB for PostgreSQL (adbpg)
• Repository URL: https://github.com/aliyun/alibabacloud-adbpg-dify-plugin

2. Submission Type

• New plugin submission
• Version update for existing plugin

3. Description

This plugin bundle integrates Alibaba Cloud AnalyticDB for PostgreSQL into Dify, providing a comprehensive RAG (Retrieval-Augmented Generation) solution. It covers the entire pipeline from data ingestion and parsing to high-performance retrieval and generation.

The bundle consists of three specialized plugins:

1. Tools Plugin (adbpg_tool): Provides a suite of tools for knowledge base management, advanced retrieval (including RRF and weighted ranking), and multimodal search (e.g., image-to-text). It also includes a professional document parser (adbpg_doc_parser) as an alternative to standard text chunking in workflows.
2. Models Plugin (adbpg_model): Acts as a Model Provider, offering unified access to Qwen LLM, Text Embedding, and Reranking models.
3. Endpoint Plugin (adbpg_endpoint): Implements an External Knowledge Base endpoint (POST /retrieval), enabling Dify to perform massive full-text and vector searches directly against AnalyticDB.

Key Features:

• Hybrid Search: Supports seamless integration of full-text and vector retrieval with customizable fusion strategies.
• Multimodal RAG: Enables image-based retrieval capabilities within Dify workflows.
• Enterprise-Grade Parsing: High-quality document layout analysis and parsing optimized for RAG.
• Unified Integration: A single bundle to handle all AnalyticDB-related capabilities in Dify.

4. Checklist

• I have read and followed the Publish to Dify Marketplace guidelines
• I have read and comply with the Plugin Developer Agreement
• I confirm my plugin works properly on both Dify Community Edition and Cloud Version
• I confirm my plugin has been thoroughly tested for completeness and functionality
• My plugin brings new value to Dify

5. Documentation Checklist

Please confirm that your plugin README includes all necessary information:

• Step-by-step setup instructions
• Detailed usage instructions
• All required APIs and credentials are clearly listed
• Connection requirements and configuration details
• Link to the repository for the plugin source code

6. Privacy Protection Information

Based on Dify Plugin Privacy Protection Guidelines:

Data Collection

Privacy Policy

• I confirm that I have prepared and included a privacy policy in my plugin package based on the Plugin Privacy Protection Guidelines

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README.md and PRIVACY.md should be in English, please read this article for more details https://docs.dify.ai/en/develop-plugin/features-and-specs/plugin-types/multilingual-readme#multilingual-readme

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https://docs.dify.ai/en/develop-plugin/features-and-specs/plugin-types/multilingual-readme#multilingual-readme

We have updated our pull request to include an English version of the README.md within the plugin includes README.md. Additionally, we've updated the repository's main README to English as well. Please review again at your convenience.