Backend-ai-agent

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**IMPROVEMENTS**

- It now applies the same UID to the spawned containers if they have the "uid-match"
feature label flag. (backported from develop)

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**FIX**

- Add missing "sorna-common" dependency and update other requirements.

-------------------

**FIX**

- Fix the wrong version range of an optional depedency package "datadog"

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**IMPROVEMENTS**

- Improve packaging so that setup.py has the source list of dependencies
whereas requirements.txt has additional/local versions from exotic
sources.

- Support exception/event logging with Sentry and runtime statistics with Datadog.

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**FIX**

- Fix interactive user inputs in the batch-mode execution.

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**NEW**

- Add support for the batch-mode API with compiled languages such as
C/C++/Java/Rust.

- Add support for the file upload API for use with the batch-mode API.
(up to 20 files per request and 1 MiB per each file)

**CHANGES**

- Only files stored in "/home/work.output" directories of kernel containers
are auto-uploaded to S3 as downloadable files, as now we rely on our
dedicated multi-media output interfaces to show plots and other graphics.
Previously, all non-hidden files in "/home/work" were uploaded.