Add checksum to manifest (#17368)

## Refactor app-dev state management and build utilities

- Store only `manifest` in `AppDevState` instead of full
`ManifestBuildResult`; add `sourcePath` to `FileStatus`
- Pass `sourcePaths` directly to watchers instead of
`ManifestBuildResult`
- Only reset `fileUploadStatus` for functions/components when their
source paths change
- Add pure `updateManifestChecksum` utility that returns a new manifest
without side effects
- Extract `processEsbuildResult` to deduplicate build result processing
between watchers
- Rename `serverlessFunctions` → `functions` in SDK code (API unchanged)
- Extract `writeManifestToOutput` to shared `manifest-writer.ts`

packages/twenty-shared/src/application/applicationManifestType.ts

@@ -13,7 +13,7 @@ export type ApplicationManifest = {
   application: Application;
   objects: ObjectManifest[];
   objectExtensions?: ObjectExtensionManifest[];
-  serverlessFunctions: ServerlessFunctionManifest[];
+  functions: ServerlessFunctionManifest[];
   frontComponents?: FrontComponentManifest[];
   roles?: RoleManifest[];
   sources: Sources;

packages/twenty-shared/src/application/frontComponentManifestType.ts

@@ -4,5 +4,6 @@ export type FrontComponentManifest = {
   description?: string;
   sourceComponentPath: string;
   builtComponentPath: string;
+  builtComponentChecksum: string | null;
   componentName: string;
 };

packages/twenty-shared/src/application/serverlessFunctionManifestType.ts

@@ -26,6 +26,7 @@ export type ServerlessFunctionManifest = SyncableEntityOptions & {
   triggers: ServerlessFunctionTriggerManifest[];
   sourceHandlerPath: string;
   builtHandlerPath: string;
+  builtHandlerChecksum: string | null;
   handlerName: string;
   toolInputSchema?: InputJsonSchema;
   isTool?: boolean;