Bump mvn cli detector timeout to 9 min

[zhenghao104]

Make mvn cli detector respect cancellation token

[Copilot]

Pull request overview

This PR updates the Maven CLI detector’s internal safety timeout for OnPrepareDetectionAsync to better bound potential hangs while still staying under the overall detection process timeout configured via the CLI.

Changes:

• Increase PrepareDetectionTimeout from 5 minutes to 9 minutes.
• Update the timeout’s XML documentation to explain the rationale.

[github-actions]

👋 Hi! It looks like you modified some files in the Detectors folder.
You may need to bump the detector versions if any of the following scenarios apply:

• The detector detects more or fewer components than before
• The detector generates different parent/child graph relationships than before
• The detector generates different devDependencies values than before

If none of the above scenarios apply, feel free to ignore this comment 🙂

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 0.0%. Comparing base (f40d70c) to head (35b7f9d).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@     Coverage Diff      @@
##   main   #1771   +/-   ##
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