dcd550788d
Add a C20 realization recording the resolution of the GER40 deep-dive's #94 finding: a hand-wired FlatGraph is not a shippable strategy (no param_space, so World-opaque); the canonical form is the Composite blueprint, the FlatGraph its compiled substrate (C23). Pins the bar-period-as-structural-construction-arg decision (spec 0051) to the structural-axis-vs-tuning-param split. refs #94