feat(ai-sdk): interlocked-enclosure model — guard-open re-scoping of contact hazards

Class C (phase-aware, generic EN ISO 14120). A contact/entanglement hazard from
a moving part is removed during NORMAL operation when the part is behind an
interlocked guard; it remains only when the guard is open (maintenance/cleaning).

- New HazardPattern.GuardableByEnclosure flag; set on HP096 (friction at
  rotating surfaces) and HP101 (entanglement of hair/clothing).
- Narrative emits interlocked_enclosure for an interlocked door/hood.
- pattern_enclosure.go: suppressedByEnclosure (drop in normal-op-only contexts)
  + guardedLifecycles (re-scope to maintenance/cleaning).
- GT #3 gains the maintenance-phase entanglement/friction rows.

Generic + regression-safe: machines that do not emit interlocked_enclosure are
unaffected. GT #3 recall 80% -> 82.4%, one false positive removed (Aufwickeln).
Kistenhub 97.1% and all 26 Bremse pinned mappings unchanged.

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

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

@@ -223,7 +223,7 @@ func (e *PatternEngine) Match(input MatchInput) *MatchOutput {
 			HumanRoles:          p.HumanRoles,
 			GeneratedHazardType: p.GeneratedHazardType,
 			MatchedFailureModes:  matchedFMs,
-			ApplicableLifecycles: p.ApplicableLifecycles,
+			ApplicableLifecycles: guardedLifecycles(p, tagSet),
 			SuggestedMeasureIDs:      p.SuggestedMeasureIDs,
 			ClarificationQuestionsDE: p.ClarificationQuestionsDE,
 			ISO12100Section:          p.ISO12100Section,
@@ -411,6 +411,11 @@ func patternMatches(p HazardPattern, tagSet map[string]bool, input MatchInput) b
 		}
 	}
 
+	// Interlocked-enclosure gate (guardable contact/entanglement). See pattern_enclosure.go.
+	if suppressedByEnclosure(p, tagSet, input.LifecyclePhases) {
+		return false
+	}
+
 	return true
 }