GA release 1.3.7

[rads-1996]

No description provided.

[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	19,161.5	19,172.5	-0.06%	✅
azure_monitor_span	yes	153,798.8	155,957.6	-1.38%	✅
otel_log	no	22,141.0	22,195.1	-0.24%	✅
otel_span	no	39,065.6	38,301.0	+2.00%	✅

[Copilot]

Pull request overview

Bumps the distro/package version to 1.3.7 for a GA release, updating both the runtime-reported version and the packaging metadata, and finalizing the changelog entry with a release date.

Changes:

• Update microsoft-opentelemetry package version from 1.3.6 → 1.3.7.
• Sync runtime version constant with packaging version.
• Mark the 1.3.7 changelog section as released on 2026-08-03.

Reviewed changes

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

File	Description
src/microsoft/opentelemetry/_version.py	Bumps the runtime VERSION constant to 1.3.7.
pyproject.toml	Updates the published package version metadata to 1.3.7.
CHANGELOG.md	Converts the 1.3.7 entry from “Unreleased” to a dated release entry.

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