perf(session): improve page management and speed up execution

Close pages immediately after tasks finish to reduce resource usage and
improve overall performance. Update corresponding test files to reflect
the new page lifecycle management.

scrapling/engines/_browsers/_camoufox.py

@@ -381,8 +381,9 @@ class StealthySession(StealthySessionMixin, SyncSession):
                 page_info.page, first_response, final_response, params.selector_config
             )
 
-            # Mark the page as finished for next use
-            page_info.mark_finished()
+            # Close the page, to free up resources
+            page_info.page.close()
+            self.page_pool.pages.remove(page_info)
 
             return response
 
@@ -701,8 +702,9 @@ class AsyncStealthySession(StealthySessionMixin, AsyncSession):
                 page_info.page, first_response, final_response, params.selector_config
             )
 
-            # Mark the page as finished for next use
-            page_info.mark_finished()
+            # Close the page, to free up resources
+            await page_info.page.close()
+            self.page_pool.pages.remove(page_info)
 
             return response