DRAFT Update semantic conventions to unreleased v1.39.0-dev

[otelbot-docs]

This is a draft PR used for identifying issues integrating the latest (unreleased) semantic conventions.

Issues

• [chore] Rename */database to */db to match area names semantic-conventions#3108
  See failed job and [link-check failure](https://github.com/open-telemetry/opentelemetry.io/actions/runs/19717769397/job/56493980415?pr=8311

  WARN File /home/runner/work/opentelemetry.io/opentelemetry.io/tmp/otel/specification/trace/api.md: cannot resolve spec link reference '/docs/specs/semconv/database/database-spans.md' (/docs/specs/semconv/database/database-spans.md)
  docs/zero-code/java/agent/supported-libraries/index.html
  target does not exist --- docs/zero-code/java/agent/supported-libraries/index.html --> /docs/specs/semconv/database/database-metrics/

  • Issue: [editorial] Drop aliases from 3108 and add a wildcard redirect rule semantic-conventions#3138

[chalin]

@vitorvasc - checks are failing. I suspect that a semconv page has moved.