Refactor DocSum example

[Spycsh]

Description

In this PR,

• reduce microservice number to improve latency and save memory, remove 3 dataprep microservices, as following Refactor dataprep multimedia2text GenAIComps#1065
• fix concurrency conflict with same filename issue [Bug] Docsum file upload handling fails with concurrent http request with same file name #1279
• fix the Gradio UI bug that audio/video file are uploaded twice

I've validated all original curl requests in README and also the Gradio UI on my environment.

Issues

#1279
opea-project/GenAIComps#1065

Type of change

List the type of change like below. Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds new functionality)
• Breaking change (fix or feature that would break existing design and interface)
• Others (enhancement, documentation, validation, etc.)

Dependencies

na

Tests

ut

[github-actions]

Dependency Review

✅ No vulnerabilities or license issues found.

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