v3.14.6 - one confidence rule

Invariant 5b split the reasons a candidate is held, and I wrote it in the output contract, where the rule is defined, and not in the decision rules, where the confidence is actually computed. So §C4 still read confidence = low when any candidate is unknown_requires_assessment on a decision-driving dependency, and DMS held by an unreachable P23/P24 is decision-driving by that wording. One document permitted medium, the other mandated low, for the same estate.

§C4 now states the two kinds where the confidence is derived, and the Low line in the always-loaded skill says the same. A gate reads every document that states when confidence drops and fails any that omits the kind that does not drop it, so the two cannot separate again.

76 gates, 117 scenarios, 3625 prerequisite checks.