Closes #7018: Wrong OCI if scroll happens before beacon fires.

[Miraeld]

Description

Fixes #7018
The beacon won't be triggered if the page has been scrolled before the initial start.

Type of change

• Bug fix (non-breaking change which fixes an issue).

Detailed scenario

• Use - https://gist.github.com/DahmaniAdame/bd58d4be051f5995aa2318d341eb342a
• Scroll to the last image
• Hit refresh while making sure the beacon runs
• See the LCP image will be related to the current viewport

Technical description

Documentation

Refer to wp-media/rocket-scripts#32

New dependencies

Updated dependencies: rocket-scripts

Risks

None

Mandatory Checklist

Code validation

• I validated all the Acceptance Criteria. If possible, provide screenshots or videos.
• I triggered all changed lines of code at least once without new errors/warnings/notices.
• I implemented built-in tests to cover the new/changed code.

Code style

• I wrote a self-explanatory code about what it does.
• I protected entry points against unexpected inputs.
• I did not introduce unnecessary complexity.
• Output messages (errors, notices, logs) are explicit enough for users to understand the issue and are actionnable.

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
Report missing for 09708aa1	✅ ∅ (target: 50.00%)

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (09708aa)	Report Missing	Report Missing	Report Missing
Head commit (bad42d1)	37744	16585	43.94%

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#7020)	0	0	∅ (not applicable)

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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Footnotes

1. Codacy didn't receive coverage data for the commit, or there was an error processing the received data. Check your integration for errors and validate that your coverage setup is correct. ↩

[hanna-meda]

@Miraeld, thank you for this PR.
Looking good on test env.
Tests Results Report below:
testrail-report-645.pdf

[Khadreal]

The PR here covers for this