Summary: Interview Query adds live SQL interview question

Why It Matters: The site now shows a real coding problem instead of a loading message. This lets users see the product value immediately without clicking or signing up.

What Changed:

• Replaced a "Loading interview question..." placeholder with a full SQL coding challenge.
• Added a detailed example including input tables (employees, departments) and expected output schema.
• Updated community stats: Member count changed from 100,000+ to 76,638+, active topics from 1,000+ to 758+, and expert coaches from 24 to 18.
• Added new customer testimonials from an Analytics Program Manager and a Data Scientist.