Content Scanner Service (#5826)

* implemented the content scanner service with caching and a way to use in the state store context

* fix swiftformat comment enforcing

* pr suggestions

ElementX/Sources/Services/ContentScanner/ContentScannerProxy.swift

@@ -0,0 +1,34 @@
+//
+// Copyright 2026 Element Creations Ltd.
+//
+// SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+// Please see LICENSE files in the repository root for full details.
+//
+
+import Foundation
+
+@preconcurrency import MatrixRustSDK
+
+nonisolated struct ContentScannerProxy: ContentScannerProxyProtocol {
+    private let contentScanner: ContentScanner
+    /// The client is held weakly for the same reason as in `MediaLoader` - to avoid keeping the
+    /// underlying `MatrixRustSDK.Client` alive longer than the owning `ClientProxy`.
+    private weak var client: Client?
+    
+    init(contentScanner: ContentScanner, client: Client) {
+        self.contentScanner = contentScanner
+        self.client = client
+    }
+    
+    func scan(mediaSource: MediaSourceProxy) async -> Result<Bool, ContentScannerProxyError> {
+        guard let client else { return .failure(.missingClient) }
+        
+        do {
+            let response = try await contentScanner.scan(client: client, mediaSource: mediaSource.underlyingSource)
+            return .success(response.clean)
+        } catch {
+            MXLog.error("Failed scanning media content: \(error)")
+            return .failure(.sdkError(error))
+        }
+    }
+}