refactor(environment): streamline environment variable handling by replacing sorting methods with direct property access and enhancing query ordering for improved performance

app/Models/Application.php

@@ -728,7 +728,14 @@ class Application extends BaseModel
     {
         return $this->morphMany(EnvironmentVariable::class, 'resourceable')
             ->where('is_preview', false)
-            ->orderBy('key', 'asc');
+            ->orderByRaw("
+                CASE 
+                    WHEN LOWER(key) LIKE 'service_%' THEN 1
+                    WHEN is_required = true AND (value IS NULL OR value = '') THEN 2
+                    ELSE 3
+                END,
+                LOWER(key) ASC
+            ");
     }
 
     public function runtime_environment_variables()
@@ -749,7 +756,14 @@ class Application extends BaseModel
     {
         return $this->morphMany(EnvironmentVariable::class, 'resourceable')
             ->where('is_preview', true)
-            ->orderByRaw("LOWER(key) LIKE LOWER('SERVICE%') DESC, LOWER(key) ASC");
+            ->orderByRaw("
+                CASE 
+                    WHEN LOWER(key) LIKE 'service_%' THEN 1
+                    WHEN is_required = true AND (value IS NULL OR value = '') THEN 2
+                    ELSE 3
+                END,
+                LOWER(key) ASC
+            ");
     }
 
     public function runtime_environment_variables_preview()