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/src/plugins/copilot/storage.ts

@@ -9,6 +9,7 @@ import {
   type FileUpload,
   type StorageProvider,
   StorageProviderFactory,
+  URLHelper,
 } from '../../fundamentals';
 
 @Injectable()
@@ -17,10 +18,13 @@ export class CopilotStorage {
 
   constructor(
     private readonly config: Config,
+    private readonly url: URLHelper,
     private readonly storageFactory: StorageProviderFactory,
     private readonly quota: QuotaManagementService
   ) {
-    this.provider = this.storageFactory.create('copilot');
+    this.provider = this.storageFactory.create(
+      this.config.plugins.copilot.storage
+    );
   }
 
   async put(
@@ -35,7 +39,7 @@ export class CopilotStorage {
       // return image base64url for dev environment
       return `data:image/png;base64,${blob.toString('base64')}`;
     }
-    return `${this.config.baseUrl}/api/copilot/blob/${name}`;
+    return this.url.link(`/api/copilot/blob/${name}`);
   }
 
   async get(userId: string, workspaceId: string, key: string) {