docs: record LinkedIn 24-hour checkpoint

[aryamthecodebreaker]

What changed

• records the LinkedIn owner-analytics snapshot captured 24 hours 55 minutes after publication
• updates the experiment row with the verified star, GitHub traffic, and npm outcomes
• separates distribution activity from unique installs and qualified feedback

Why

The growth log had a due 24-hour checkpoint. This preserves the real result instead of reconstructing it later from rolling windows.

Verified snapshot

• LinkedIn: 72 impressions, 6 members reached, 4 video views, 3 reactions, 1 comment, 0 post-attributed profile viewers or followers
• GitHub: 4 stars; rolling 14-day traffic of 174 views / 17 unique and 634 clones / 193 unique, updated through July 22
• npm: 1,159 downloads in the latest seven-day window and 516 on the latest completed day
• qualified external feedback: none

Validation

• git diff --check
• values checked against the owner analytics screenshot, GitHub traffic API, repository API, and npm downloads API