Add redis prefix option

Iceshrimp.Backend/Controllers/Schemas/AuthRequest.cs

@@ -3,12 +3,12 @@ using J = System.Text.Json.Serialization.JsonPropertyNameAttribute;
 namespace Iceshrimp.Backend.Controllers.Schemas;
 
 public class AuthRequest {
-	[J("username")] public required string  Username { get; set; }
-	[J("password")] public required string  Password { get; set; }
+	[J("username")] public required string Username { get; set; }
+	[J("password")] public required string Password { get; set; }
 }
 
 public class RegistrationRequest : AuthRequest {
-	[J("invite")]   public          string? Invite   { get; set; }
+	[J("invite")] public string? Invite { get; set; }
 }
 
 public class ChangePasswordRequest {

Iceshrimp.Backend/Core/Configuration/Config.cs

@@ -52,9 +52,10 @@ public sealed class Config {
 	public sealed class RedisSection {
 		public required string  Host     { get; init; } = "localhost";
 		public required int     Port     { get; init; } = 6379;
-		public          int?    Database { get; init; }
+		public          string? Prefix   { get; init; }
 		public          string? Username { get; init; }
 		public          string? Password { get; init; }
+		public          int?    Database { get; init; }
 
 		//TODO: TLS settings
 	}

Iceshrimp.Backend/Core/Extensions/ServiceExtensions.cs

@@ -70,6 +70,7 @@ public static class ServiceExtensions {
 		var config = configuration.GetSection("Redis").Get<Config.RedisSection>();
 		if (config == null) throw new Exception("Failed to initialize redis: Failed to load configuration");
 		services.AddStackExchangeRedisCache(options => {
+			options.InstanceName = config.Prefix;
 			options.ConfigurationOptions = new ConfigurationOptions {
 				User            = config.Username,
 				Password        = config.Password,

Iceshrimp.Backend/configuration.ini

@@ -24,9 +24,10 @@ Password = iceshrimp
 [Redis]
 Host = localhost
 Port = 6379
-;;Database = 0
+;;Prefix =
 ;;Username =
 ;;Password =
+;;Database = 0
 
 [Logging:LogLevel]
 Default = Information