feat: Implement API client and token models with hashing and JWT authentication

- Added ApiClientModel and ApiTokenModel for managing API clients and tokens.
- Introduced ConfigurationDefinitionModel and ConfigurationValueModel for configuration management.
- Created CredentialSecretModel for storing credential secrets.
- Developed DeploymentArtifactModel and DeploymentBatchModel for deployment management.
- Enhanced DeploymentTargetModel and DeploymentTemplateSelectionModel to support template revisions.
- Added TemplateRevisionModel and TemplateVersionModel for versioning templates.
- Implemented ApiClientSecretHasher for secure secret hashing.
- Created ApiTokenService for generating and validating JWT tokens.
- Updated QueueJobService to handle deployment requests with artifacts.
- Configured authentication settings in appsettings.json for JWT and Negotiate authentication.

Models/ConfigurationValueModel.cs

@@ -0,0 +1,52 @@
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Microsoft.SelfService.Portal.Core.API.Models
+{
+    public static class ConfigurationValueSourceTypes
+    {
+        public const string Static = "Static";
+        public const string ScopeProperty = "ScopeProperty";
+        public const string Expression = "Expression";
+        public const string SecretReference = "SecretReference";
+    }
+
+    public static class ConfigurationValueScopeTypes
+    {
+        public const string TemplateRevision = "TemplateRevision";
+        public const string Environment = "Environment";
+        public const string Domain = "Domain";
+        public const string Target = "Target";
+        public const string DeploymentGroup = "DeploymentGroup";
+        public const string Deployment = "Deployment";
+        public const string TemplateSelection = "TemplateSelection";
+    }
+
+    public class ConfigurationValueModel : BaseModel
+    {
+        [Column(Order = 1)]
+        public Guid ConfigurationDefinitionId { get; set; }
+
+        [Column(Order = 2)]
+        public string ScopeType { get; set; } = ConfigurationValueScopeTypes.TemplateRevision;
+
+        [Column(Order = 3)]
+        public Guid ScopeId { get; set; }
+
+        [Column(Order = 4)]
+        public string ValueSourceType { get; set; } = ConfigurationValueSourceTypes.Static;
+
+        [Column(Order = 5)]
+        public string? SourcePath { get; set; }
+
+        [Column(Order = 6)]
+        public string? ValueJson { get; set; }
+
+        [Column(Order = 7)]
+        public string ValueHash { get; set; } = string.Empty;
+
+        [Column(Order = 8)]
+        public int SortOrder { get; set; }
+
+        public ConfigurationDefinitionModel ConfigurationDefinition { get; set; } = null!;
+    }
+}