fix(aria): fix os_eol_status enum cast — use native SQL throughout

PostgreSQL named enum types require explicit casts that Hibernate's
derived query methods don't generate. Replace countByOsEolStatus and
findByOsEolStatusOrderByPostureScoreAsc with native @Query variants that
CAST(:status AS os_eol_status). Same pattern already applied to severity.

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

src/main/java/com/hiveops/aria/controller/DevicePostureController.java

@@ -52,7 +52,7 @@ public class DevicePostureController {
         Pageable pageable = PageRequest.of(page, size);
 
         if (osEolStatus != null) {
-            return postureRepository.findByOsEolStatusOrderByPostureScoreAsc(osEolStatus, pageable);
+            return postureRepository.findByOsEolStatusNativeOrderByPostureScoreAsc(osEolStatus.name(), pageable);
         }
         if ("low".equals(scoreFilter)) {
             return postureRepository.findByPostureScoreLessThanOrderByPostureScoreAsc(50, pageable);

src/main/java/com/hiveops/aria/controller/ThreatEventController.java

@@ -1,6 +1,5 @@
 package com.hiveops.aria.controller;
 
-import com.hiveops.aria.entity.DeviceSecurityPosture;
 import com.hiveops.aria.entity.ThreatEvent;
 import com.hiveops.aria.repository.DeviceSecurityPostureRepository;
 import com.hiveops.aria.repository.PrecursorSequenceAlertRepository;
@@ -57,7 +56,7 @@ public class ThreatEventController {
 
         long activeSequences = sequenceAlertRepository.countByResolvedAtIsNull();
         long lowPostureCount = postureRepository.countByPostureScoreLessThan(50);
-        long eolDeviceCount  = postureRepository.countByOsEolStatus(DeviceSecurityPosture.OsEolStatus.EOL);
+        long eolDeviceCount  = postureRepository.countByOsEolStatusNative("EOL");
 
         return ResponseEntity.ok(Map.of(
                 "totalEvents",        totalEvents,

src/main/java/com/hiveops/aria/repository/DeviceSecurityPostureRepository.java

@@ -4,6 +4,8 @@ import com.hiveops.aria.entity.DeviceSecurityPosture;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
 import org.springframework.stereotype.Repository;
 
 import java.util.Optional;
@@ -15,13 +17,14 @@ public interface DeviceSecurityPostureRepository extends JpaRepository<DeviceSec
 
     Page<DeviceSecurityPosture> findAllByOrderByPostureScoreAsc(Pageable pageable);
 
-    Page<DeviceSecurityPosture> findByOsEolStatusOrderByPostureScoreAsc(
-            DeviceSecurityPosture.OsEolStatus osEolStatus, Pageable pageable);
-
     Page<DeviceSecurityPosture> findByPostureScoreLessThanOrderByPostureScoreAsc(
             int score, Pageable pageable);
 
     long countByPostureScoreLessThan(int score);
 
-    long countByOsEolStatus(DeviceSecurityPosture.OsEolStatus osEolStatus);
+    @Query(value = "SELECT COUNT(*) FROM device_security_posture WHERE os_eol_status = CAST(:status AS os_eol_status)", nativeQuery = true)
+    long countByOsEolStatusNative(@Param("status") String status);
+
+    @Query(value = "SELECT * FROM device_security_posture WHERE os_eol_status = CAST(:status AS os_eol_status) ORDER BY posture_score ASC", nativeQuery = true, countQuery = "SELECT COUNT(*) FROM device_security_posture WHERE os_eol_status = CAST(:status AS os_eol_status)")
+    Page<DeviceSecurityPosture> findByOsEolStatusNativeOrderByPostureScoreAsc(@Param("status") String status, Pageable pageable);
 }