release: Release 7 gems

[github-actions]

This pull request prepares new gem releases for the following gems:

• opentelemetry-api 1.6.0 (was 1.5.0)
• opentelemetry-sdk 1.8.1 (was 1.8.0)
• opentelemetry-exporter-otlp-logs 0.2.1 (was 0.2.0)
• opentelemetry-exporter-otlp-metrics 0.6.0 (was 0.5.0)
• opentelemetry-metrics-api 0.4.0 (was 0.3.0)
• opentelemetry-metrics-sdk 0.8.0 (was 0.7.3)
• opentelemetry-logs-sdk 0.3.0 (was 0.2.0)

For each gem, this pull request modifies the gem version and provides an initial changelog entry based on conventional commit messages. You can edit these changes before merging, to release a different version or to alter the changelog text.

• To confirm this release, merge this pull request, ensuring the "release: pending" label is set. The release script will trigger automatically on merge.
• To abort this release, close this pull request without merging.

The generated changelog entries have been copied below:

---

opentelemetry-api

v1.6.0 / 2025-08-14

• ADDED: Add noop methods on Trace::Span for attributes and events

---

opentelemetry-sdk

v1.8.1 / 2025-08-14

• FIXED: Remove patch constraint on Zipkin exporter
• DOCS: Fix Resource merge documentation

---

opentelemetry-exporter-otlp-logs

v0.2.1 / 2025-08-14

• FIXED: Support hash bodies and attribute values in OTLP logs exporter

---

opentelemetry-exporter-otlp-metrics

v0.6.0 / 2025-08-14

• ADDED: Add support for exporting asynchronous instruments

---

opentelemetry-metrics-api

v0.4.0 / 2025-08-14

• ADDED: Support asynchronous instruments: ObservableGauge, ObservableCounter and ObservableUpDownCounter
• FIXED: Update max instrument name length from 63 to 255 characters and allow / in instrument names

---

opentelemetry-metrics-sdk

v0.8.0 / 2025-08-14

• BREAKING CHANGE: Update default aggregation temporality for counter, histogram, and up down counter to cumulative

• ADDED: Support asynchronous instruments: ObservableGauge, ObservableCounter and ObservableUpDownCounter

• FIXED: Validate scale range on exponential histograms and raise exception if out of bounds

• FIXED: Update max instrument name length from 63 to 255 characters and allow / in instrument names

• FIXED: Validate scale range and raise exception if out of bounds for exponential histograms

---

opentelemetry-logs-sdk

v0.3.0 / 2025-08-14

• ADDED: Update error message for invalid log record attribute
• ADDED: Set logs exporter default to OTLP

[kaylareopelle]

All gems were released successfully, but the otelbot token doesn't have permissions to update PRs at this time, so the workflow failed because the PR couldn't be updated. I added and updated the labels manually. I believe label application problems are also related to the token.