feat(kvb-check-confidence, kvb-git-pr-label): declare 90/5 only after the quality gate

Operator rule of 2026-11-03: nothing is declared 90/5 (fix confidence of at least 90 %, break risk under 5 %) before the project's full quality gate passed on the exact head, make quality-high in infinito-nexus; until then the numbers are provisional and the missing gate is the residual. The 90/5 label follows the same gate, and a hotfix takes the next free gate slot. #1365 had the label after targeted tests only; #1357 before it left main red on a lint-only check.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

skills/kvb-check-confidence/SKILL.md

@@ -33,8 +33,11 @@ Calibration rules:
   (test, reproduction, live probe) justifies more.
 
 A threshold the operator named ("95% confidence, break risk ≤5%") is a gate on
-the work, handled as the `kvb-check-break-risk` skill's last section says, for both
-numbers.
+the work for both numbers, handled as the `kvb-check-break-risk` skill's last
+section says. Fix confidence of 90 % or more with break risk under 5 % (90/5)
+needs the project's full quality gate green on the exact head (in
+infinito-nexus `make quality-high`); before that, the numbers are
+provisional and the missing gate is the residual.
 
 Objective: the `kvb-skill-tune` skill's **Objective** section. Two figures with their residuals replace a
 hedging paragraph and save the operator a verification round trip.

skills/kvb-git-pr-label/SKILL.md

@@ -13,7 +13,9 @@ holds:
   name the run or issue.
 - **`90/5`**: the pull request meets the bar of the `kvb-org-split` skill (fix
   confidence of at least 90 %, break risk under 5 %), from the
-  `kvb-check-confidence` numbers in its body or freshly assessed.
+  `kvb-check-confidence` numbers in its body or freshly assessed, and only
+  after the project's full quality gate passed on the PR's exact head; a
+  hotfix takes the next free gate slot.
 
 ## Procedure