docs: add pgflow 0.13.0 release notes for step output storage optimization

[jumski]

Add pgflow 0.13.0 release notes documenting step output storage improvements

This PR adds release notes for pgflow 0.13.0, highlighting the new atomic step output storage feature. The notes explain:

• Step outputs are now stored in step_states.output when a step completes
• This optimization makes Map-to-Map chains 2x faster by reducing query complexity from O(N²) to O(N)
• Querying step outputs is now simpler with direct access from step_states table
• A detailed migration guide for safely applying this change, including steps to test locally and handle worker transitions
• How this change lays the foundation for upcoming conditional execution features

The release notes include performance benchmarks showing the 2.17x speed improvement for tasks reading large outputs.

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[jumski]

• docs: add pgflow 0.13.0 release notes for step output storage optimization #570 👈 (View in Graphite)
• refactor: optimize step output storage and aggregation #569
• feat: store step outputs in step_states table for atomic completion #568
• main

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☁️ Nx Cloud last updated this comment at 2026-01-07 11:50:54 UTC

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[jumski]

Merge activity

• Jan 7, 11:53 AM UTC: A user started a stack merge that includes this pull request via Graphite.
• Jan 7, 11:53 AM UTC: @jumski merged this pull request with Graphite.

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