Enhance check-in verification to ensure integer distance values

- Added a new function, `roundedDistanceMeters`, to round the calculated distance for NFC and GPS methods.
- Updated the `verifyTargetCheckIn` function to use the new rounding logic, ensuring distance values are integers.
- Added unit tests to verify that distance values returned for NFC check-ins are whole numbers, improving data consistency.

src/modules/field/shared/check-in-verification.spec.ts

@@ -74,6 +74,23 @@ describe('check-in-verification', () => {
 
     expect(result.method).toBe('gps');
     expect(result.distanceMeters).toBeGreaterThan(100);
+    expect(Number.isInteger(result.distanceMeters)).toBe(true);
+  });
+
+  it('returns whole meters for NFC distance so it matches the integer column', () => {
+    const result = verifyBranchCheckIn(
+      target,
+      {
+        method: 'nfc',
+        nfcId: 'nfc-123',
+        latitude: -6.2005,
+        longitude: 106.8005,
+      },
+      100,
+    );
+
+    expect(result.distanceMeters).not.toBeNull();
+    expect(Number.isInteger(result.distanceMeters)).toBe(true);
   });
 
   it('accepts GPS when the target has no location if skipGpsValidation is set', () => {

src/modules/field/shared/check-in-verification.ts

@@ -1,6 +1,15 @@
 import { BadRequestException } from '@nestjs/common';
 import { haversineDistanceMeters } from './geo-distance';
 
+function roundedDistanceMeters(
+  lat1: number,
+  lon1: number,
+  lat2: number,
+  lon2: number,
+): number {
+  return Math.round(haversineDistanceMeters(lat1, lon1, lat2, lon2));
+}
+
 export const CHECK_IN_METHODS = ['nfc', 'qr', 'gps'] as const;
 export type CheckInMethod = (typeof CHECK_IN_METHODS)[number];
 
@@ -117,7 +126,7 @@ function verifyTargetCheckIn(
       throw new BadRequestException(locationMissingMessage);
     }
     if (canMeasure) {
-      distanceMeters = haversineDistanceMeters(
+      distanceMeters = roundedDistanceMeters(
         payload.latitude,
         payload.longitude,
         targetLatitude,
@@ -135,7 +144,7 @@ function verifyTargetCheckIn(
     distanceMeters:
       distanceMeters == null
         ? target.latitude != null && target.longitude != null
-          ? haversineDistanceMeters(
+          ? roundedDistanceMeters(
               payload.latitude,
               payload.longitude,
               target.latitude,