docs: flip Meilisearch to OpenSearch references when v1.2.0 ships (umbrella)

[brandonrc]

Summary

Tracking issue for the day v1.2.0 is tagged. At that point, the search backend documented as primary across user-facing surfaces flips from Meilisearch to OpenSearch. This issue lists every surface that must be updated atomically.

The transition callouts (filed separately) are interim and stay in place until this issue closes; once flipped, those callouts can be removed or reworded as historical notes.

Background

• artifact-keeper#830 merged 2026-04-24 on main, replacing Meilisearch with OpenSearch.
• v1.1.x (current stable) keeps Meilisearch and is not getting an OpenSearch backport.
• artifact-keeper-iac chart on main already uses OpenSearch (artifact-keeper-iac#67).

Surfaces to flip on v1.2.0 release

artifact-keeper-site

• src/content/docs/docs/deployment/helm.mdx (service list, mermaid diagram showing MS["Meilisearch"])
• src/content/docs/docs/deployment/docker.mdx (service table, Meilisearch troubleshooting section L224-L285)
• src/content/docs/docs/deployment/windows.mdx (Optional: Meilisearch section)
• src/content/docs/docs/deployment/aws.mdx (diagram and config)
• Remove or rework v1.1.x-to-v1.2.0 transition callouts added by sibling issue once flip is complete.

artifact-keeper/.github/profile/README.md (org profile)

• L79 Core Features blurb says "Meilisearch-powered search"
• L195 architecture diagram has Meili[("Meilisearch")] node
• L350 end credits link to meilisearch.com

(File a companion PR against artifact-keeper/.github when this issue is being worked.)

Acceptance criteria

• No Meilisearch references in published site docs after v1.2.0 release tag.
• No Meilisearch references in .github/profile/README.md after v1.2.0 release tag.
• Migration notes added or linked from migration/ if applicable.

Related

• artifact-keeper#830 OpenSearch migration
• artifact-keeper#865 v1.2.0 CHANGELOG