test(ai-sdk): GT #3 completeness — 8 shared white-goods hazards + CNC gate

Phase 1 of the commercial white-goods expansion (EN ISO 10472 family). Extend
GT #3 with 8 completeness hazards a Fachmann expects but that were neither in
the GT nor previously questioned: dry-run boiler overheating, residual/stored
electrical energy, sharp-edge cut, tipping, interlock-failure, unexpected
restart, backflow (EN 1717), microbial/legionella. Enrich the UC-M narrative
with the real features so existing library patterns can fire.

Result: 4/8 auto-covered by existing patterns (dry-run, residual voltage,
tipping, interlock-failure) — recall 84% (21/25). Remaining gaps documented:
spray-arm contact (4.3), sharp-edge cut (4.6), backflow (2.3), restart (6.4).

Gate the re-surfaced CNC leak ("spanende Bearbeitung", high_temperature-only)
via dom_cnc. Kistenhub 97.1% and Bremse pinned mappings unchanged.

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

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

@@ -67,6 +67,7 @@ var domainGateTerms = map[string]string{
 	"gondel": "dom_wind", "rotorblatt": "dom_wind", "windenergieanlage": "dom_wind",
 	// CNC / Zerspanung
 	"drehmaschine": "dom_cnc", "fraesmaschine": "dom_cnc",
+	"spanende": "dom_cnc", "spanenden bearbeitung": "dom_cnc",
 	// Landwirtschaft
 	"maehdrescher": "dom_agri", "ballenpresse": "dom_agri", "feldhaecksler": "dom_agri",
 	// Roll-/Fahrtreppe