The uniform fan-out process exit code (granular 0/2/1; see
docs/CONSTITUTION.md, Target selection). 0 = every target ok (or an empty
selection); 2 = partial (some ok, some failed); 1 = orchestration error
(outer ok: false) OR every target failed. Decoupled from the envelope's
outer ok, which only reports orchestration success.
The uniform fan-out process exit code (granular 0/2/1; see
docs/CONSTITUTION.md, Target selection).0= every target ok (or an empty selection);2= partial (some ok, some failed);1= orchestration error (outerok: false) OR every target failed. Decoupled from the envelope's outerok, which only reports orchestration success.