Get baby-shelf (I.B.6) remaining capacity

General Instruction I.B.6 to Form S-3 caps a issuer whose public float is under $75M at one third of that float in any trailing 12-month period. This endpoint returns the limit, the trailing takedowns counted against it, and the remaining capacity — each figure echoing the inputs it was computed from (`priceKind`, `priceAsOf`, `floatSource`, `window`, `takedownSource`). Float is valued on the SEC's 60-day-high basis (Instruction 1), not on the current quote. 🔴 `constraintApplies: false` means "float is at or above $75M, so the one-third cap does not bind" — a FAVOURABLE finding. It is NOT the signal for an issuer that cannot use Form S-3 at all. A delisted issuer instead comes back `suppressed: true` with `suppressedReason: "delisted_ib6_ineligible"` and every dollar figure NULL. Do not read `suppressed` as `$0 raisable`, and do not read `constraintApplies: false` as clearance. Suppression is fail-open: only positive evidence that the issuer is not exchange-listed fires it.