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/QuoteBomCalculateRequest.php

@@ -30,7 +30,7 @@ public function rules(): array
             'PC' => 'nullable|string|in:SCREEN,STEEL',
             'GT' => 'nullable|string|in:wall,ceiling,floor,mixed',
             'MP' => 'nullable|string|in:single,three',
-            'CT' => 'nullable|string|in:basic,smart,premium',
+            'CT' => 'nullable|string|in:exposed,embedded,embedded_no_box',
             'WS' => 'nullable|numeric|min:0|max:500',
             'INSP' => 'nullable|numeric|min:0',
 
@@ -82,7 +82,7 @@ public function getInputVariables(): array
             'PC' => $validated['PC'] ?? 'SCREEN',
             'GT' => $validated['GT'] ?? 'wall',
             'MP' => $validated['MP'] ?? 'single',
-            'CT' => $validated['CT'] ?? 'basic',
+            'CT' => $validated['CT'] ?? 'exposed',
             'WS' => (float) ($validated['WS'] ?? 50),
             'INSP' => (float) ($validated['INSP'] ?? 50000),
         ];