[apiview-stub-generator] Use uv for package install (revert timeout to 120s)

[Hameedkunkanoor]

Summary

Installs the target package with uv pip install (when uv is on PATH) instead of pip before generating the API view, and reverts the package-install timeout from 300s back to the original 120s.

Why

Follow-up to #16395. That PR raised the timeout to 300s to accommodate azure-ai-agentserver-core, whose install pulls the full Microsoft OpenTelemetry instrumentation tree. Verbose diagnostics showed the slowness was pip's dependency resolver backtracking over the large, beta-pinned graph (42 packages, 52 downloads, 0 cached, no network retries, only a few MB transferred) — a CPU/resolver problem, not network. The install took ~370s under pip and even blew past 300s.

uv's resolver handles the same tree in seconds (the repo's dev-requirement installs already use uv and resolve in ~1-2s). Switching apistub's own package install to uv removes the root cause, so the elevated timeout is no longer necessary.

Changes

• _install_package: prefer uv pip install --python <interp> when uv is available; fall back to pip install otherwise.
• Revert install timeout 300s -> 120s.
• Bump version 0.3.29 -> 0.3.30 + CHANGELOG entry.

Notes

• uv is already the default installer across the azure-sdk-for-python tooling (AZPYSDK_PIP_IMPL=uv), with UV_DEFAULT_INDEX wired to the authenticated feed — so this aligns apistub's last pip holdout with the established pattern.
• Falls back to pip cleanly if uv is absent, so no hard dependency is introduced.

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[Copilot]

Pull request overview

Updates the apiview-stub-generator package installation step to prefer uv pip install (when available) to avoid pip’s slow dependency backtracking on large graphs, allowing the install timeout to be reverted to its original value.

Changes:

• Prefer uv pip install --python <interp> over pip install when uv is available on PATH, with a clean fallback to pip.
• Revert the package install timeout back to 120s.
• Bump package version to 0.3.30 and add a CHANGELOG entry describing the change.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
packages/python-packages/apiview-stub-generator/apistub/_stub_generator.py	Prefer uv for package installs and revert install timeout to 120s.
packages/python-packages/apiview-stub-generator/apistub/_version.py	Version bump to 0.3.30.
packages/python-packages/apiview-stub-generator/CHANGELOG.md	Document the uv install change and timeout revert.