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.

appsettings.json

@@ -6,6 +6,23 @@
     }
   },
   "AllowedHosts": "*",
+  "Authentication": {
+    "OnPremClientCredentials": {
+      "Issuer": "Microsoft.SelfService.Portal.Core.API",
+      "Audience": "Microsoft.SelfService.Portal.Core.API",
+      "SigningKey": "DevelopmentOnly-OnPremClientCredentials-SigningKey-ChangeMe",
+      "TokenLifetimeSeconds": 3600,
+      "AllowedTokenScopes": [
+        "deployment.read",
+        "deployment.write",
+        "queue.process",
+        "template.read",
+        "credential.resolve",
+        "token.manage",
+        "token.admin"
+      ]
+    }
+  },
   "ConnectionStrings": {
     "Context": "Server=.;Database=SSP;TrustServerCertificate=True;Encrypt=False;Trusted_Connection=True"
   }