fix: enforce MAX_BLOCKS_PER_CONTENT_LIBRARY when creating containers

[Chessing234]

Summary

create_container() did not check MAX_BLOCKS_PER_CONTENT_LIBRARY before adding a draft container, so users at the component limit could still create empty units/sections. This adds the same draft-count guard used in validate_can_add_block_to_library().

Fixes #37697

Test plan

• Set MAX_BLOCKS_PER_CONTENT_LIBRARY to a low value (e.g. 5)
• Create components until the limit is hit; confirm new components are rejected
• Attempt to create a container; confirm BlockLimitReachedError is raised

Made with Cursor

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[mphilbrick211]

Hi @Chessing234! Welcome, and thank you for this contribution! In order for your CLA check to turn green, you'll need to submit a CLA form. If you are contributing as an individual, please fill out the individual CLA form here.

If you are contributing on behalf of an organization, please have your manager reach out to oscm@axim.org so you may be added to your org's existing entity agreement.

Please let me know if you have any questions. Thanks!

[mphilbrick211]

Hi @Chessing234! Welcome, and thank you for this contribution! In order for your CLA check to turn green, you'll need to submit a CLA form. If you are contributing as an individual, please fill out the individual CLA form here.

If you are contributing on behalf of an organization, please have your manager reach out to oscm@axim.org so you may be added to your org's existing entity agreement.

Please let me know if you have any questions. Thanks!

Hi @Chessing234! Just checking in on this to see if you plan to pursue the pull requests you've drafted. Thanks!

[e0d]

@Chessing234
Your branch was behind the base. I've pulled in changes from master as a merge commit which will update your branch and cause the tests to be re-run. You should pull the changes into your local branch.

[e0d]

@Chessing234 it looks like there are some failing checks, can you have a look?

Please note that we use conventional commits across Open edX projects, I see some failures here. You can read about the details here. Can you please amend your commit messages to follow our standard?

[Chessing234]

Thanks — I'll align the commit messages to conventional commits. CLA is still pending on my side.

[Chessing234]

@e0d Commit messages are now conventional (fix: …) and the branch is rebased onto current master (including your earlier merges). Also fixed the pylint line-too-long on the block-limit raise.

CLA still needs signing on my side before that check can go green.

[Chessing234]

Pulled the master merge and fixed the conventional-commit / commitlint failure. CLA still pending on my side.