Only enumerate materialised items in working set

[claucambra]

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[Copilot]

Pull Request Overview

This PR refines the handling of materialised items during working set enumeration by updating test cases, refactoring the MaterialisedEnumerationObserver’s completion handler, and adding a new “visitedDirectory” property to metadata models. Key changes include:

• Updated test cases to cover scenarios with no preexisting state and mixed materialisation.
• Modifications to metadata models and related database methods to support the new visitedDirectory property.
• Adjustments in enumerator and observer logic for improved enumeration and state propagation.

Reviewed Changes

Copilot reviewed 17 out of 17 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
Tests/NextcloudFileProviderKitTests/MaterialisedEnumerationObserverTests.swift	Updated test functions and expectations
Tests/NextcloudFileProviderKitTests/FilesDatabaseManagerTests.swift	Adjustments to test assertions and setup
Tests/InterfaceTests/MockRemoteInterfaceTests.swift	Modified assertions for root item naming
Sources/NextcloudFileProviderKit/Metadata/SendableItemMetadata.swift	Added visitedDirectory property
Sources/NextcloudFileProviderKit/Item/Item+Modify.swift	Refactored guard declaration for metadata removal
Sources/NextcloudFileProviderKit/Extensions/NKFile+Extensions.swift	Updated root item fixup logic
Sources/NextcloudFileProviderKit/Enumeration/MaterialisedEnumerationObserver.swift	Updated observer callback signature and logic
Sources/NextcloudFileProviderKit/Enumeration/Enumerator.swift	Adjusted working set handling and pagination changes
Sources/NextcloudFileProviderKit/Database/FilesDatabaseManager.swift	Enhanced metadata update logic and added materialisation