♻️ Basically completed the separate of account service

DysonNetwork.Shared/Data/CloudFileReferenceObject.cs

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+namespace DysonNetwork.Shared.Data;
+
+/// <summary>
+/// The class that used in jsonb columns which referenced the cloud file.
+/// The aim of this class is to store some properties that won't change to a file to reduce the database load.
+/// </summary>
+public class CloudFileReferenceObject : ModelBase, ICloudFile
+{
+    public string Id { get; set; } = null!;
+    public string Name { get; set; } = string.Empty;
+    public Dictionary<string, object>? FileMeta { get; set; } = null!;
+    public Dictionary<string, object>? UserMeta { get; set; } = null!;
+    public string? MimeType { get; set; }
+    public string? Hash { get; set; }
+    public long Size { get; set; }
+    public bool HasCompression { get; set; } = false;
+}

DysonNetwork.Shared/Data/ICloudFile.cs

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+using NodaTime;
+
+namespace DysonNetwork.Shared.Data;
+
+/// <summary>
+/// Common interface for cloud file entities that can be used in file operations.
+/// This interface exposes the essential properties needed for file operations
+/// and is implemented by both CloudFile and CloudFileReferenceObject.
+/// </summary>
+public interface ICloudFile
+{
+    public Instant CreatedAt { get; }
+    public Instant UpdatedAt { get; }
+    public Instant? DeletedAt { get; }
+    
+    /// <summary>
+    /// Gets the unique identifier of the cloud file.
+    /// </summary>
+    string Id { get; }
+
+    /// <summary>
+    /// Gets the name of the cloud file.
+    /// </summary>
+    string Name { get; }
+
+    /// <summary>
+    /// Gets the file metadata dictionary.
+    /// </summary>
+    Dictionary<string, object>? FileMeta { get; }
+
+    /// <summary>
+    /// Gets the user metadata dictionary.
+    /// </summary>
+    Dictionary<string, object>? UserMeta { get; }
+
+    /// <summary>
+    /// Gets the MIME type of the file.
+    /// </summary>
+    string? MimeType { get; }
+
+    /// <summary>
+    /// Gets the hash of the file content.
+    /// </summary>
+    string? Hash { get; }
+
+    /// <summary>
+    /// Gets the size of the file in bytes.
+    /// </summary>
+    long Size { get; }
+
+    /// <summary>
+    /// Gets whether the file has a compressed version available.
+    /// </summary>
+    bool HasCompression { get; }
+}

DysonNetwork.Shared/Data/ModelBase.cs

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+using NodaTime;
+
+namespace DysonNetwork.Shared.Data;
+
+public interface IIdentifiedResource
+{
+    public string ResourceIdentifier { get; }
+}
+
+public abstract class ModelBase
+{
+    public Instant CreatedAt { get; set; }
+    public Instant UpdatedAt { get; set; }
+    public Instant? DeletedAt { get; set; }
+}