MLE-29694 fixes for vulnerabilities and flaky tests

[RitaChen609]

Bumped qs from 6.15.0 to 6.15.2

Increased xdmp lock timeouts in plan-search fragment options tests and made teardown more tolerant

[Copilot]

Pull request overview

This PR appears aimed at improving CI/pipeline stability and configurability for MarkLogic-related tests and tasks (e.g., reducing test flakiness around lock handling and allowing non-localhost deployments), while also updating a Node dependency patch version.

Changes:

• Increased MarkLogic lock timeouts in plan-search tests and made lock teardown more tolerant of missing/expired locks.
• Updated Gradle curl* tasks to use mlHost instead of hardcoding localhost.
• Bumped qs from 6.15.0 to 6.15.2 (with lockfile update).

Reviewed changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated 2 comments.

File	Description
test-basic/plan-search.js	Adjusts lock acquisition duration and makes teardown lock-release tolerant to errors.
test-app/build.gradle	Uses mlHost in curl task URLs instead of localhost.
package.json	Updates qs dependency patch version.
package-lock.json	Updates lockfile entries for the qs patch version bump.