Remove support for deserialization of old pipeline_outputs from pipeline snapshot #10168
Description
Summary and motivation
When using pipeline breakpoints, Haystack creates pipeline snapshots that include pipeline_outputs. In this PR, we fixed the (de)serialization logic for pipeline_outputs so that snapshots now use the correct serialization schema.
As a result, older snapshots still contain pipeline_outputs in the legacy format, and we currently maintain backward-compatibility logic to deserialize them. This compatibility layer is only temporary and must be removed before the Haystack 2.23.0 release.
Required Action
Remove the backward-compatibility code paths that handle legacy pipeline_outputs serialization.
(Update the code sections here once the PR is merged)
Checklist
Tasks
- The changes are merged in the
mainbranch (Code + Docstrings) - Release notes have documented the breaking change
- A new version of
haystack-aihas been released on PyPI - Docs at https://docs.haystack.deepset.ai/ were updated
- Integrations on haystack-core-integrations were updated (if needed) - This step might require a Breaking change proposal on the repo
- Notebooks on https://github.com/deepset-ai/haystack-cookbook were updated (if needed)
- Tutorials on https://github.com/deepset-ai/haystack-tutorials were updated (if needed)
- Articles on https://github.com/deepset-ai/haystack-home/tree/main/content were updated (if needed)
- Integration tile on https://github.com/deepset-ai/haystack-integrations was updated (if needed)