Function identity_banner 

pub fn identity_banner() -> String

The one-line identity banner, e.g. latexml_oxide (latexml-oxide 0.9.0; revision a1b2c3d) started 2026-08-21 14:32:05 -0400.

Emit it through Note! so it reaches both stderr and the captured .latexml.log, and inherits the verbosity gate (--quiet suppresses it).