Distro release 1.8.6

[rads-1996]

1.8.6 (2026-02-05)

Features Added

• Enable live metrics by default
  (#44902)

Breaking Changes

• The default sampling behavior has been changed from ApplicationInsightsSampler with 100% sampling (all traces sampled) to RateLimitedSampler with 5.0 traces per second. This change significantly reduces telemetry volume for high-traffic applications and provides better cost optimization out of the box. Impact: Applications with more than 5 requests per second will see fewer traces exported by default.
  (#44925)

Other Changes

• Add missing copyright headers and ensure consistent formatting across files.

[Copilot]

Pull request overview

Prepares the azure-monitor-opentelemetry distro 1.8.6 release by finalizing release metadata and aligning dependencies with the intended exporter release.

Changes:

• Update azure-monitor-opentelemetry-exporter dependency pin from 1.0.0b46 to 1.0.0b47.
• Mark the azure-monitor-opentelemetry changelog entry for 1.8.6 with a release date and clean up empty sections.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
sdk/monitor/azure-monitor-opentelemetry/setup.py	Bumps the pinned exporter dependency to ~=1.0.0b47.
sdk/monitor/azure-monitor-opentelemetry/CHANGELOG.md	Moves 1.8.6 from “Unreleased” to a dated release entry and removes an empty “Bugs Fixed” section.