**feat: update terminology from 'restore' to 'import' for sparse data operations**

### Changes:
- Updated button label in `examples/demo.html` from "Restore Sparse Data" to "Import Sparse Data".
- Replaced references to `restoreSparseData` with `importSparseData` across code:
  - Event listener for the sparse data button now uses `importSparseData`.
  - Function name changed to `importSparseData` to reflect new terminology.
  - Logging messages updated for consistency ("restored" -> "imported").
- Modified the database operation to use `importSparseData` for better alignment with the updated terminology.

### Purpose:
Improved clarity and consistency in terminology related to sparse data operations. The term "import" better aligns with its functionality and enhances user understanding across the application.

examples/demo.html

@@ -675,7 +675,7 @@ await db.init()
         <button id="clear-db-btn" class="danger">Clear Database</button>
         <button id="export-data-btn">Backup Data</button>
         <button id="import-data-btn">Restore Data</button>
-        <button id="import-sparse-data-btn" class="secondary">Restore Sparse Data</button>
+        <button id="import-sparse-data-btn" class="secondary">Import Sparse Data</button>
       </div>
 
       <div class="results" id="db-status">
@@ -1027,7 +1027,7 @@ await db.init()
     document.getElementById('clear-db-btn').addEventListener('click', clearDatabase)
     document.getElementById('export-data-btn').addEventListener('click', backupData)
     document.getElementById('import-data-btn').addEventListener('click', restoreData)
-    document.getElementById('import-sparse-data-btn').addEventListener('click', restoreSparseData)
+    document.getElementById('import-sparse-data-btn').addEventListener('click', importSparseData)
 
     // Data model operations - Legacy buttons
     document.getElementById('add-entity-btn')?.addEventListener('click', addEntity)
@@ -1481,8 +1481,8 @@ await db.init()
     input.click()
   }
 
-  // Function to create and restore sparse data (without vectors)
-  async function restoreSparseData() {
+  // Function to create and import sparse data (without vectors)
+  async function importSparseData() {
     if (!database) {
       log('db-status', 'Please initialize database first')
       return
@@ -1521,13 +1521,13 @@ await db.init()
         version: '1.0.0'
       }
 
-      // Restore the sparse data
-      await database.restore(sparseData)
-      log('db-status', 'Sparse data restored successfully')
+      // Import the sparse data
+      await database.importSparseData(sparseData)
+      log('db-status', 'Sparse data imported successfully')
       log('db-status', 'Vectors were automatically created for items without vectors')
       updateDatabaseVisualization()
     } catch (error) {
-      log('db-status', 'Error restoring sparse data: ' + error.message)
+      log('db-status', 'Error importing sparse data: ' + error.message)
     }
   }