pub fn log_tagged(level: LogLevel, tag: EventTag, message: &str)Expand description
log with an explicit EventTag. The session-log write
(unconditional, all tags) and the fallback stderr path are
identical to log; the tag only changes how a tag-aware
display sink files the message — e.g. the readout engine
attaches phase-start renders to PhaseStart so the terminal
sink keeps them out of its scrollback (they show in its managed
phase-history region instead).