feat(server): runtime setting support (#5602)

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<details open="true"><summary>Generated summary (powered by <a href="https://app.graphite.dev">Graphite</a>)</summary>

> ## TL;DR
> This pull request adds a new migration file, a new model, and new modules related to runtime settings. It also introduces a new `Runtime` service that allows getting, setting, and updating runtime configurations.
>
> ## What changed
> - Added a new migration file `migration.sql` that creates a table called `application_settings` with columns `key` and `value`.
> - Added a new model `ApplicationSetting` with properties `key` and `value`.
> - Added a new module `RuntimeSettingModule` that exports the `Runtime` service.
> - Added a new service `Runtime` that provides methods for getting, setting, and updating runtime configurations.
> - Modified the `app.module.ts` file to import the `RuntimeSettingModule`.
> - Modified the `index.ts` file in the `fundamentals` directory to export the `Runtime` service.
> - Added a new file `def.ts` in the `runtime` directory that defines the runtime configurations and provides a default implementation.
> - Added a new file `service.ts` in the `runtime` directory that implements the `Runtime` service.
>
> ## How to test
> 1. Run the migration script to create the `application_settings` table.
> 2. Use the `Runtime` service to get, set, and update runtime configurations.
> 3. Verify that the runtime configurations are stored correctly in the database and can be retrieved and modified using the `Runtime` service.
>
> ## Why make this change
> This change introduces a new feature related to runtime settings. The `Runtime` service allows the application to dynamically manage and modify runtime configurations without requiring a restart. This provides flexibility and allows for easier customization and configuration of the application.
</details>

packages/backend/server/schema.prisma

@@ -22,15 +22,16 @@ model User {
   /// for example, the value will be false if user never registered and invited into a workspace by others.
   registered      Boolean   @default(true)
 
-  features             UserFeatures[]
-  customer             UserStripeCustomer?
-  subscriptions        UserSubscription[]
-  invoices             UserInvoice[]
-  workspacePermissions WorkspaceUserPermission[]
-  pagePermissions      WorkspacePageUserPermission[]
-  connectedAccounts    ConnectedAccount[]
-  sessions             UserSession[]
-  aiSessions           AiSession[]
+  features              UserFeatures[]
+  customer              UserStripeCustomer?
+  subscriptions         UserSubscription[]
+  invoices              UserInvoice[]
+  workspacePermissions  WorkspaceUserPermission[]
+  pagePermissions       WorkspacePageUserPermission[]
+  connectedAccounts     ConnectedAccount[]
+  sessions              UserSession[]
+  aiSessions            AiSession[]
+  updatedRuntimeConfigs RuntimeConfig[]
 
   @@index([email])
   @@map("users")
@@ -505,3 +506,28 @@ model DataMigration {
 
   @@map("_data_migrations")
 }
+
+enum RuntimeConfigType {
+  String
+  Number
+  Boolean
+  Object
+  Array
+}
+
+model RuntimeConfig {
+  id            String            @id @db.VarChar
+  type          RuntimeConfigType
+  module        String            @db.VarChar
+  key           String            @db.VarChar
+  value         Json              @db.Json
+  description   String            @db.Text
+  updatedAt     DateTime          @updatedAt @map("updated_at") @db.Timestamptz(6)
+  deletedAt     DateTime?         @map("deleted_at") @db.Timestamptz(6)
+  lastUpdatedBy String?           @map("last_updated_by") @db.VarChar(36)
+
+  lastUpdatedByUser User? @relation(fields: [lastUpdatedBy], references: [id])
+
+  @@unique([module, key])
+  @@map("app_runtime_settings")
+}