Function observed_codegen_enabled 

pub fn observed_codegen_enabled() -> bool

Is the OBSERVED codegen profile active (Wave 13)? When set, observation is NOT elided at lowering and the AOT backend EMITS logicaffeine_system::obs calls for Note/Warn/Record/During. Default OFF — the release/elided profile, where observation is erased before codegen (byte-identical artifact, §0.7).