PoJuDeSu

Progress on #359

**Describe the bug** When creating creating an agent instance, spacy.load("en_core_web_md") raises an exception. **To Reproduce** 1. Start the web server. 2. Go to http://127.0.0.1:3002/v1/complete 3. See error **Desktop (please complete...

Closes #415

Run submission after end date

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This PR adds a new boolean field, `submission_must_finish_before_end`, to the `Challenge` model, allowing challenges to accept submissions that are uploaded before the challenge ends, even if processing happens later. For...

Fix #4280 Improve challenge title validation

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Fix #4280 Use regex to match alphanumeric characters and the common punctuation symbols, specificly `.,!?()-[]`

Fix #1443 Update import in vulntotal datasources

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Fix #1443 Change the usage of `vulnerabilities.utils.fetch_github_graphql_query` to `fetchcode.package_versions.github_response` in `github.py`

AppRegistryNotReady error when setting up vulntotal

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### Description I encountered an `AppRegistryNotReady` error when trying to set up vulntotal using Docker. This issue arises at the final step when running `vulntotal --help`. ### Steps to Reproduce...