fix: ensure Companies and Resources get filters during incremental sync fallback

Fixed critical logic bug where Companies and Resources were not getting
proper filters applied when falling back from incremental to full sync.

Root Cause:
- During scheduled incremental sync, Companies and Resources correctly
  identify they don't support incremental sync
- However, the filter-building logic was in an else block that only
  executed for non-incremental syncs
- This caused Companies and Resources to sync with NO filters at all
- Autotask API now rejects queries without filters, returning:
  'Value cannot be null. Parameter name: filters'

Fix:
- Restructured logic so filter building happens for BOTH:
  1. Non-incremental (full) syncs
  2. Incremental syncs that fall back to full sync
- Companies and Resources now get active filters applied even during
  scheduled incremental syncs

This resolves the scheduled sync failures for Companies, Resources,
and all other entities that were failing due to the cascading effect
of early failures.

lib/services/entity-sync.ts

@@ -102,10 +102,14 @@ export class EntitySyncService {
           entityLogger.error('Failed to get last sync time', {}, err);
           throw new Error(`Failed to determine sync time: ${err.message}`);
         }
-      } else if (isIncremental && !supportsIncremental) {
+      }
+      
+      // For full sync OR entities that don't support incremental, build filters
+      if (!isIncremental || (isIncremental && !supportsIncremental)) {
+        if (isIncremental && !supportsIncremental) {
           entityLogger.info(`${entity} does not support incremental sync, performing full sync instead`);
-      } else {
-        // For full sync, build filters
+        }
+        
         const filters: Array<{ field: string; op: string; value: any }> = [];
         
         // Special handling for entities that require filters