Stabilize logger.enabled by removing spec_unstable_logs_enabled feature flag

[Copilot]

The spec_unstable_logs_enabled feature flag gated the event_enabled method used for log level filtering. This feature is now stable in the OpenTelemetry specification, so the flag is removed and the functionality is always available.

Changes

Core API & SDK

• opentelemetry: event_enabled method now always available on Logger trait
• opentelemetry_sdk: event_enabled method now always available on LogProcessor and LogExporter traits
• All conditional compilation directives removed from log processor implementations

Appenders

• opentelemetry-appender-tracing: Event filtering always enabled
• opentelemetry-appender-log: Log level filtering always enabled

Dependencies

• Feature flag removed from all Cargo.toml files
• Updated stress and opentelemetry-stdout dependencies

Documentation

• Updated CHANGELOGs for all affected crates
• Removed feature flag documentation from lib.rs files
• Updated benchmark requirements and comments

Migration

Users explicitly enabling the feature flag should remove it from their feature lists:

# Before
opentelemetry = { version = "0.31", features = ["logs", "spec_unstable_logs_enabled"] }

# After
opentelemetry = { version = "0.32", features = ["logs"] }

The functionality remains unchanged—event_enabled is now always available without gating.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• esm.ubuntu.com
  • Triggering command: /usr/lib/apt/methods/https (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Stabilize logger.enabled in sdk</issue_title>
<issue_description>once open-telemetry/opentelemetry-specification#4536 is merged and released in the spec.

The "spec_unstable_logs_enabled" feature flag needs to be removed completely. All methods/code should be enabled always.
Do this for opentelemetry, opentelemetry_sdk, opentelemetry-appender-tracing and opentelemetry-appender-log crates.
Also update changelog.md file for all above crates to inform of the above change.

Once done, do a thorough search across repo to find any "spec_unstable_logs_enabled" references, and remove them. If there are places where it cannot be removed, create issues to track as follow ups.</issue_description>

Comments on the Issue (you are @copilot in this section)

@cijothomas The "spec_unstable_logs_enabled" feature flag needs to be removed completely. All methods/code should be enabled always. Do this for `opentelemetry`, `opentelemetry_sdk`, `opentelemetry-appender-tracing` and `opentelemetry-appender-log` crates. Also update changelog.md file for all above crates to inform of the above change.

Once done, do a thorough search across repo to find any "spec_unstable_logs_enabled" references, and remove them. If there are places where it cannot be removed, create issues to track as follow ups.</comment_new>

• Fixes Stabilize logger.enabled in sdk #3020

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.8%. Comparing base (cff5728) to head (d6ab4ba).

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #3225   +/-   ##
=====================================
  Coverage   80.8%   80.8%           
=====================================
  Files        128     128           
  Lines      23288   23288           
=====================================
  Hits       18821   18821           
  Misses      4467    4467           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.