Initialize OneSettings for Microsoft distro

[Leighton Chen (lzchen)]

Summary

• initialize the OneSettings resource provider during Microsoft distro configuration
• guard the private OneSettings import and type the optional factory
• add coverage for initialization behavior and update dependency metadata/changelog

[github-actions]

Performance comparison

Threshold: regressions >15.0% on gating scenarios fail the build. Higher ops/s is better; positive Δ means the PR is slower.

Scenario	Gating	Baseline (ops/s)	Candidate (ops/s)	Δ %	Status
azure_monitor_log	yes	19,910.8	19,764.8	+0.74%	✅
azure_monitor_span	yes	157,928.0	158,679.8	-0.47%	✅
otel_log	no	23,045.7	22,289.6	+3.39%	✅
otel_span	no	39,894.7	38,746.2	+2.96%	✅

[Copilot]

Pull request overview

This PR ensures the Microsoft OpenTelemetry Python distro contributes its identity to the shared OneSettings profile by initializing the Azure Monitor exporter’s configuration manager at the start of use_microsoft_opentelemetry(). It also updates the Azure Monitor exporter dependency and adds unit coverage around the new initialization behavior.

Changes:

• Add guarded import + initialization hook for the Azure Monitor exporter configuration manager (OneSettings) in use_microsoft_opentelemetry().
• Add tests validating initialization occurs (and occurs before exporter wiring) and that absence/disablement is handled.
• Bump azure-monitor-opentelemetry-exporter to 1.0.0b56 and update changelog/lockfile + ignore VS Code settings.

Reviewed changes

Copilot reviewed 4 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/microsoft/opentelemetry/_distro.py	Adds guarded access to the Azure Monitor configuration manager and initializes it early in use_microsoft_opentelemetry().
tests/test_distro.py	Adds coverage for configuration manager initialization ordering and availability/disablement scenarios.
pyproject.toml	Updates the Azure Monitor exporter dependency version constraint to ~=1.0.0b56.
uv.lock	Updates the locked Azure Monitor exporter version/artifacts and corresponding dependency metadata.
CHANGELOG.md	Documents the new OneSettings profile contribution behavior under the next unreleased version.
.gitignore	Ignores .vscode/ workspace settings.

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