fix: [stats] QuoteStatService codebridge DB 커넥션 연결

- codebridge DB로 이관된 테이블(sales_prospect_consultations, sales_prospects) 커넥션을 mysql → codebridge로 변경
- config/database.php에 codebridge 커넥션 추가
- quote_daily 집계 실패 해결

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

config/database.php

@@ -82,6 +82,26 @@
             ]) : [],
         ],
 
+        // Codebridge DB (이관된 Sales/Finance/Admin 등)
+        'codebridge' => [
+            'driver' => 'mysql',
+            'host' => env('CODEBRIDGE_DB_HOST', env('DB_HOST', '127.0.0.1')),
+            'port' => env('CODEBRIDGE_DB_PORT', env('DB_PORT', '3306')),
+            'database' => env('CODEBRIDGE_DB_DATABASE', 'codebridge'),
+            'username' => env('CODEBRIDGE_DB_USERNAME', env('DB_USERNAME', 'root')),
+            'password' => env('CODEBRIDGE_DB_PASSWORD', env('DB_PASSWORD', '')),
+            'unix_socket' => env('DB_SOCKET', ''),
+            'charset' => 'utf8mb4',
+            'collation' => 'utf8mb4_unicode_ci',
+            'prefix' => '',
+            'prefix_indexes' => true,
+            'strict' => true,
+            'engine' => null,
+            'options' => extension_loaded('pdo_mysql') ? array_filter([
+                PDO::MYSQL_ATTR_SSL_CA => env('MYSQL_ATTR_SSL_CA'),
+            ]) : [],
+        ],
+
         // 5130 레거시 DB (chandj)
         'chandj' => [
             'driver' => 'mysql',