Add missing os import

[vsantele]

Description

Fixes #4042, Fixes #4047

PR #4013 forgot to import os in static_web_blueprint.py

All Promptflow Contribution checklist:

• The pull request does not introduce [breaking changes].
• CHANGELOG is updated for new features, bug fixes or other significant changes.
• I have read the contribution guidelines.
• I confirm that all new dependencies are compatible with the MIT license.
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• Title of the pull request is clear and informative.
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Testing Guidelines

• Pull request includes test coverage for the included changes.

[github-actions]

Hi, thank you for your interest in helping to improve the prompt flow experience and for your contribution. We've noticed that there hasn't been recent engagement on this pull request. If this is still an active work stream, please let us know by pushing some changes or leaving a comment.

[igarioshka]

latest version of the library in pip fails to execute due to this error.

[vsantele]

Hi @igarioshka,
To avoid this error, you can pin promptflow to the version 1.18.0.

The only diff is the change that introduces this bug with the missing import: release/promptflow/1.18.0...release/promptflow/1.18.1

Don't wait for this PR to be merged.

[igarioshka]

@vsantele, we have downgraded the version, it's just that I'd really want this PR to be merged,
I have left a comment to show github automation that there is activity. :)
It baffles me that this issue should've been caught by a simple linter but was not.
Coming from a compiled language - this would be a compile time error, but all the checks and workflows that are configured in this repository did not catch that import error.

[vsantele]

Promptflow has not received much attention for at least a year.

On the Azure AI Foundry Discord server, they mentioned a deprecation plan for Promptflow, but without any ETA yet.

This is not the right time to start a Promptflow project. I have personally started migrating to the semantic kernel.

[github-actions]

Hi, thank you for your interest in helping to improve the prompt flow experience and for your contribution. We've noticed that there hasn't been recent engagement on this pull request. If this is still an active work stream, please let us know by pushing some changes or leaving a comment.