fix(iace): roadmap group B — citation/license/tier cleanup

C1: drop the misleading OSHA §1910.212(a)(5) fan-guard citation from M602
    (overhead lift clearance) — EN 349 + EN ISO 13854 already cover it.
C2: frame M237's 25/500 mm as Richtwerte to be determined per EN ISO 13854
    (single factual values in prose are facts, not table reproduction — but
    keep the conservative caveat).
C3: keep ergonomic W=2 deliberately and document why — ESAW ranks it the most
    frequent non-fatal mode (24.7%) but that population doesn't transfer to an
    acute machine point-hazard; the machine GT governs.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

ai-compliance-sdk/internal/iace/measures_library_lift_endstop.go

@@ -78,7 +78,6 @@ func getLiftEndstopMeasures() []ProtectiveMeasureEntry {
 			NormReferences: []string{
 				"EN 349 (Mindestabstaende gegen Quetschen von Koerperteilen)",
 				"EN ISO 13854 (Mindestabstaende gegen Quetschen)",
-				"OSHA 29 CFR 1910.212(a)(5) (Lueftergitter ≤ 1/2 in als Anker)",
 			},
 			RiskReduction: &RiskReduction{SeverityDelta: -2, ExposureDelta: -1},
 			Tags:          []string{"crush_point", "gravity_risk"},