PM-5444: Show top percentile for highest profile ratings

[jmgasper]

What was broken
Profiles with a positive rating above the highest returned rating distribution bucket showed the rating value but omitted the Top X% percentile badge.

Root cause
The percentile calculation returned undefined when no distribution bucket contained or exceeded the member rating. For outlier ratings above the final bucket, that suppressed the badge even though the member should still be shown as a top-ranked member.

What was changed
Treat ratings above the final distribution bucket as the top known member percentage so the existing formatter renders a visible Top 1% badge instead of hiding the percentile details.

Any added/updated tests
Added utility coverage for ratings above the highest distribution range and component coverage for rendering Top 1% with a 4051 profile rating.

Validation run:

• PASS yarn test:no-watch --runTestsByPath src/apps/profiles/src/member-profile/about-me/MemberRatingCard/MemberRatingCard.utils.spec.ts src/apps/profiles/src/member-profile/about-me/MemberRatingCard/MemberRatingCard.spec.tsx
• PASS yarn lint
• PASS yarn run build, with existing CSS order and lint warning output from unrelated modules
• FAIL yarn test:no-watch: existing unrelated failures in src/apps/work specs, including engagement-editor schema validation, ReviewersField missing mocked fetchAiReviewConfigByChallenge, and ChallengeEditorForm launch expectations