fix: handle non-numeric values in Resources integer fields

Autotask API returns string values like 'PRIMARY' for some integer
fields (e.g., emailTypeCode). Added safeInt() helper function to:
- Parse numeric values correctly
- Return null for non-numeric strings
- Handle null/undefined/empty values

This prevents database errors when syncing Resources with non-standard
field values from Autotask API.

lib/utils/entity-mapper.ts

@@ -275,6 +275,13 @@ function mapProject(data: any): Record<string, any> {
  * Map Resource entity
  */
 function mapResource(data: any): Record<string, any> {
+  // Helper to safely parse integer values (returns null for non-numeric strings)
+  const safeInt = (value: any): number | null => {
+    if (value === null || value === undefined || value === '') return null;
+    const num = typeof value === 'number' ? value : parseInt(value, 10);
+    return isNaN(num) ? null : num;
+  };
+
   return {
     id: data.id,
     // Name fields
@@ -300,29 +307,29 @@ function mapResource(data: any): Record<string, any> {
     is_active: data.isActive !== undefined ? data.isActive : true,
     
     // Employment details
-    resource_type: data.resourceType,
+    resource_type: safeInt(data.resourceType),
     payroll_identifier: data.payrollIdentifier,
     pay_roll_identifier: data.payrollIdentifier, // Keep for backward compatibility
-    payroll_type: data.payrollType,
+    payroll_type: safeInt(data.payrollType),
     accounting_reference_id: data.accountingReferenceID,
     internal_cost: data.internalCost,
     hire_date: data.hireDate,
     
     // Location and availability
-    location_id: data.locationID,
+    location_id: safeInt(data.locationID),
     travel_availability_pct: data.travelAvailabilityPct,
-    default_service_desk_role_id: data.defaultServiceDeskRoleID,
+    default_service_desk_role_id: safeInt(data.defaultServiceDeskRoleID),
     
     // System preferences
-    email_type_code: data.emailTypeCode,
+    email_type_code: safeInt(data.emailTypeCode),
     number_format: data.numberFormat,
     time_format: data.timeFormat,
     date_format: data.dateFormat,
     
     // Demographics and security
-    gender: data.gender,
-    license_type: data.licenseType,
-    security_level: data.securityLevel,
+    gender: safeInt(data.gender),
+    license_type: safeInt(data.licenseType),
+    security_level: safeInt(data.securityLevel),
     
     // Ratings
     survey_resource_rating: data.surveyResourceRating,