Eea.volto.policy

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* Breaking: Requires `plone.volto >= 4.1.0`
* Change: Add upgrade step to add block_types index to the Plone catalog
[avoinea - refs 271233]

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* Bug fix: Fix teaserGrid to gridBlock to transaction.commit every 100 items
[avoinea - refs 265726]

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* Feature: Migrate teaserGrid to gridBlock structure from Volto 17 core
[avoinea - refs 265726]

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* Change: feat(serializer): added effective to the default_metadata_fields
[ichim-david]

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* Change: Develop typo
[alecghica]

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* Bug fix: fixed the ZMI styles
[alecghica refs 267310]