feat: [견적] 제어기 타입 체계 변경 (basic/smart/premium → exposed/embedded/embedded_no_box)

- QuoteBomBulkCalculateRequest: controller validation 값 변경, 기본값 exposed
- QuoteBomCalculateRequest: 동일 변경
- FormulaEvaluatorService: CT → controller_type 매핑 추가 (exposed→노출형, embedded→매립형)
- FormulaEvaluatorService: CT 값에 따라 backbox_qty 자동 설정 (embedded만 뒷박스 포함)
- QuoteService: CT 기본값 exposed로 변경

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/Http/Requests/Quote/QuoteBomBulkCalculateRequest.php

@@ -34,7 +34,7 @@ public function rules(): array
             'items.*.productCategory' => 'nullable|string|in:SCREEN,STEEL',
             'items.*.guideRailType' => 'nullable|string|in:wall,ceiling,floor,mixed',
             'items.*.motorPower' => 'nullable|string|in:single,three',
-            'items.*.controller' => 'nullable|string|in:basic,smart,premium',
+            'items.*.controller' => 'nullable|string|in:exposed,embedded,embedded_no_box',
             'items.*.wingSize' => 'nullable|numeric|min:0|max:500',
             'items.*.inspectionFee' => 'nullable|numeric|min:0',
 
@@ -45,7 +45,7 @@ public function rules(): array
             'items.*.PC' => 'nullable|string|in:SCREEN,STEEL',
             'items.*.GT' => 'nullable|string|in:wall,ceiling,floor,mixed',
             'items.*.MP' => 'nullable|string|in:single,three',
-            'items.*.CT' => 'nullable|string|in:basic,smart,premium',
+            'items.*.CT' => 'nullable|string|in:exposed,embedded,embedded_no_box',
             'items.*.WS' => 'nullable|numeric|min:0|max:500',
             'items.*.INSP' => 'nullable|numeric|min:0',
 
@@ -128,7 +128,7 @@ private function normalizeInputVariables(array $item): array
             'PC' => $item['productCategory'] ?? $item['PC'] ?? 'SCREEN',
             'GT' => $item['guideRailType'] ?? $item['GT'] ?? 'wall',
             'MP' => $item['motorPower'] ?? $item['MP'] ?? 'single',
-            'CT' => $item['controller'] ?? $item['CT'] ?? 'basic',
+            'CT' => $item['controller'] ?? $item['CT'] ?? 'exposed',
             'WS' => (float) ($item['wingSize'] ?? $item['WS'] ?? 50),
             'INSP' => (float) ($item['inspectionFee'] ?? $item['INSP'] ?? 50000),
         ];