Fixes KB recall for inference endpoint connectors

[yuliia-fryshko]

Closes https://github.com/elastic/obs-ai-team/issues/638

Fix KB recall for inference endpoint connectors.

Resolve connectors via inference.getConnectorById in the context function and chat recall route instead of actionsClient.get, which only loads action saved objects and fails for eis endpoint ids.

Release note

Fixes knowledge base recall in Observability AI Assistant when the selected connector is an inference endpoint.

[infra-vault-gh-plugin-prod]

Pinging @elastic/obs-ai-team (Team:obs-ai)

[github-actions]

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Just comment with:

• /oblt-deploy : Deploy a Kibana instance using the Observability test environments.
• run docs-build : Re-trigger the docs validation. (use unformatted text in the comment!)

[yuliia-fryshko]

/oblt-deploy

[kibanamachine]

💛 Build succeeded, but was flaky

• Buildkite Build
• Commit: a5b8c19
• Build duration: 66 mins
• Kibana Serverless Image: docker.elastic.co/kibana-ci/kibana-serverless:pr-271753-a5b8c19a5785

Failed CI Steps

• FTR Configs #39
• FTR Configs #190

Metrics [docs]

✅ unchanged

History

cc @yuliia-fryshko

[elastic-vault-github-plugin-prod]

Kibana Exploratory Testing — execution report

Run Metadata

• Triggered by: Issue #451
• Elasticsearch image tag: 9.5.0-SNAPSHOT
• Kibana image: docker.elastic.co/kibana-ci/kibana-serverless:pr-271753-a5b8c19a5785
• Date: 2026-05-28
• PR: elastic/kibana#271753 — Fix KB recall for inference endpoint connectors
• Mode: PR-targeted (journeys generated from PR diff)
• Journeys executed: 8
• Passed: 8
• Errored: 0
• Findings: 0 bugs, 0 warnings, 0 info

Findings

No findings -- all journeys completed without issues.

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[viduni94]

@yuliia-fryshko Can you please backport this to all affected versions?
And don't skip release notes. Add release_note:fix and mention the release note in a ## Release note section in the PR description. See guidelines here.

[viduni94]

@yuliia-fryshko Can you also make sure there are no left over actionsClient implementations after this fix.
Thanks

[neptunian]

Is this possible to test?

[viduni94]

Is this possible to test?

@neptunian If you are referring to manual tests, I reproduced the error on a QA serverless project, then tested the same query on the serverless deployment on this PR.

Our API tests bypass this error because it always uses the actionsClient for the test and creates an SO beforehand. We should look into how we can update these to use the feature registry instead, now that connectors are deprecated.
cc: @yuliia-fryshko

[yuliia-fryshko]

/oblt-deploy