v0.0.39

What's Changed

• [codex] Fix runbook console log output preview by @mbakgun in #170
• impl/otel by @mbakgun in #171
• update/version-readme by @mbakgun in #174

Heym now speaks OpenTelemetry. Every workflow run becomes a trace: one span per run, one per node, with model and token usage on each. Send it to Jaeger, Tempo, Honeycomb, or any OTLP backend. No instrumentation code, just one env var.

Full Changelog: v0.0.38...v0.0.39