Chore: Replace cacheExtent with scrollCacheExtent in ListViews

[ZhuchkaTriplesix]

Problem

The Flutter analyzer reports deprecated_member_use warnings across multiple ListView.builder instances. We are currently using the cacheExtent property. Since Flutter v3.41+, this has been deprecated in favor of scrollCacheExtent.

Proposed Solution

Rename all instances of cacheExtent to scrollCacheExtent in ListView and GridView widgets.

Trade-offs

• Pros: Resolves linter warnings and keeps the codebase up-to-date with modern Flutter APIs. Ensures proper list virtualization behavior in future engine upgrades.
• Cons: None. This is a direct API migration.

Impact

• Risk: Zero.
• Affected Files:
  • lib/features/mongodb/mongo_collections_view.dart
  • lib/features/mongodb/mongo_documents_view.dart
  • lib/features/postgresql/postgres_browser_views.dart
  • lib/features/redis/redis_keys_view.dart

[ZhuchkaTriplesix]

Closed: Reverted attempt to rename 'cacheExtent' to 'scrollCacheExtent'. Flutter 3.41.6 stable (used in CI) does not define 'scrollCacheExtent' on ListView. 'cacheExtent' must be kept for backwards compatibility until Flutter engine updates.