[9.4] test: mock real I/O in unit tests to stop fail-slow flakes (#4455) - #4466
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<!--Provide a general description of the code changes in your pull request. If the change relates to a specific issue, include the link at the top. If this is an ad-hoc/trivial change and does not have a corresponding issue, please describe your changes in enough details, so that reviewers and other team members can understand the reasoning behind the pull request.--> Several unit tests passed assertions but intermittently failed CI under the default 1s `pytest-fail-slow` threshold because they still hit real I/O: - Oracle/MSSQL tests patched `Engine.connect` but still called real `create_engine` - GraphQL `close()` accessed the cached `session` property, creating an `aiohttp.ClientSession` even when none was used - Some GitLab `get_docs` integration tests left `get_work_items_group` unmocked, triggering real HTTP for epic fetches This PR mocks `create_engine` via a shared test helper, guards GraphQL session teardown, stubs epic fetches where not under test, and adds a regression test for GraphQL close behavior. ## Checklists <!--You can remove unrelated items from checklists below and/or add new items that may help during the review.--> #### Pre-Review Checklist - [x] this PR does NOT contain credentials of any kind, such as API keys or username/passwords (double check `config.yml.example`) - [x] this PR has a meaningful title - [ ] this PR links to all relevant github issues that it fixes or partially addresses - [x] if there is no GH issue, please create it. Each PR should have a link to an issue - [x] this PR has a thorough description - [x] Covered the changes with automated tests - [x] Tested the changes locally - [x] Added a label for each target release version (example: `v7.13.2`, `v7.14.0`, `v8.0.0`) - [ ] For bugfixes: backport safely to all minor branches still receiving patch releases - [ ] Considered corresponding documentation changes - [ ] Contributed any configuration settings changes to the configuration reference - [ ] if you added or changed Rich Configurable Fields for a Native Connector, you made a corresponding PR in [Kibana](https://github.com/elastic/kibana/blob/main/packages/kbn-search-connectors/types/native_connectors.ts) #### Changes Requiring Extra Attention <!--Please call out any changes that require special attention from the reviewers and/or increase the risk to availability or security of the system after deployment. Remove the ones that don't apply.--> ## Related Pull Requests * #4184 * #4442 ## Release Note <!--If you think this enhancement/fix should be included in the release notes, please write a concise user-facing description of the change here. You should also label the PR with `release_note` so the release notes author(s) can easily look it up.-->
entsearchmachine
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Sep 9, 2026
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Backports the following commits to 9.4: