Track SMS sent counts by type (mass, singular, auth, auto, admin).

Charge/refund bump the matching counter plus total; expose smsSentByType on business APIs.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/customers/customers.service.ts

@@ -728,7 +728,12 @@ export class CustomersService {
       },
     );
 
-    const charged = await this.smsBilling.charge(businessId, resolved.message);
+    const charged = await this.smsBilling.charge(
+      businessId,
+      resolved.message,
+      1,
+      'singular',
+    );
 
     try {
       const result = await this.sms.sendMessage(
@@ -745,7 +750,7 @@ export class CustomersService {
         templateVerified: resolved.templateVerified,
       };
     } catch (err) {
-      await this.smsBilling.refund(businessId, charged);
+      await this.smsBilling.refund(businessId, charged, 1, 'singular');
       if (
         err instanceof BadRequestException ||
         err instanceof ServiceUnavailableException
@@ -883,6 +888,7 @@ export class CustomersService {
         businessId,
         sample.message,
         recipients.length,
+        'mass',
       );
     } else {
       personalizedPayloads = [];
@@ -912,6 +918,7 @@ export class CustomersService {
         businessId,
         totalCost,
         personalizedPayloads.length,
+        'mass',
       );
     }
 
@@ -950,6 +957,7 @@ export class CustomersService {
             businessId,
             refundAmount,
             remaining.length,
+            'mass',
           );
           charged = 0;
           throw err;
@@ -971,6 +979,7 @@ export class CustomersService {
           businessId,
           charged,
           personalized ? personalizedPayloads.length : recipients.length,
+          'mass',
         );
       }
       if (