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

---

<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/fundamentals/utils/promise.ts

@@ -1,4 +1,4 @@
-import { defer, retry } from 'rxjs';
+import { defer as rxjsDefer, retry } from 'rxjs';
 
 export class RetryablePromise<T> extends Promise<T> {
   constructor(
@@ -10,7 +10,7 @@ export class RetryablePromise<T> extends Promise<T> {
     retryIntervalInMs: number = 300
   ) {
     super((resolve, reject) => {
-      defer(() => new Promise<T>(executor))
+      rxjsDefer(() => new Promise<T>(executor))
         .pipe(
           retry({
             count: retryTimes,
@@ -42,3 +42,9 @@ export function retryable<Ret = unknown>(
     retryIntervalInMs
   );
 }
+
+export function defer(dispose: () => Promise<void>) {
+  return {
+    [Symbol.asyncDispose]: dispose,
+  };
+}

packages/backend/server/src/fundamentals/utils/types.ts

@@ -7,7 +7,20 @@ export function ApplyType<T>(): ConstructorOf<T> {
   };
 }
 
-type Join<Prefix, Suffixes> = Prefix extends string | number
+export type PathType<T, Path extends string> =
+  T extends Record<string, any>
+    ? string extends Path
+      ? unknown
+      : Path extends keyof T
+        ? T[Path]
+        : Path extends `${infer K}.${infer R}`
+          ? K extends keyof T
+            ? PathType<T[K], R>
+            : unknown
+          : unknown
+    : unknown;
+
+export type Join<Prefix, Suffixes> = Prefix extends string | number
   ? Suffixes extends string | number
     ? Prefix extends ''
       ? Suffixes
@@ -18,7 +31,7 @@ type Join<Prefix, Suffixes> = Prefix extends string | number
 export type LeafPaths<
   T,
   Path extends string = '',
-  MaxDepth extends string = '...',
+  MaxDepth extends string = '.....',
   Depth extends string = '',
 > = Depth extends MaxDepth
   ? never