Add YamlDefinitionUploader for AI Catalog YAML storage

Sam Beckhamrequested to merge
ai-catalog-yaml-definition-uploader into master

What does this MR do and why?

Adds a CarrierWave uploader for storing AI Catalog YAML definitions in object storage:

  • Ai::Catalog::YamlDefinitionUploader with ObjectStorage::Concern
  • Storage location: :ai_catalog
  • Hashed path structure: yaml_definitions/<version_id> with root_hash: ai_catalog_item_id
  • Fixed filename: definition.yml

This is Part 2 of a series splitting up !227895 to add object storage support for large YAML definitions in the AI Catalog.

MR Series

MR Description Dependencies
1a !228120 (merged) - Database columns None
1b !228122 (merged) - Infrastructure (feature flag, object storage config) None
2 (this MR) YamlDefinitionUploader (CarrierWave uploader) 1b
3 Model layer: Mount uploader, add transparent accessor 1a, 2
4 Service layer & schema: Upload in services, make yaml_definition optional 3

Dependencies

This MR depends on !228122 (merged) (1b) being merged first, as it provides the storage_location :ai_catalog configuration.

Issue: #591638

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