Function current_timestamp 

pub fn current_timestamp() -> u64

Returns the current Unix timestamp in seconds.

This is a centralized utility function to avoid duplicate implementations across the codebase (CQ-H1). Uses SystemTime::now() with fallback to 0 if the system clock is before the Unix epoch.

Examples

use subcog::current_timestamp;

let ts = current_timestamp();
assert!(ts > 0); // Should be a reasonable Unix timestamp