feat(ai): add deep reading model and controller method

- Introduced `AIDeepReadingModel` to define the structure for deep reading responses.
- Added `getDeepReading` method in `AIController` to fetch deep reading data for a given article ID.
- Updated imports in `ai.ts` to include the new deep reading model.

Signed-off-by: Innei <tukon479@gmail.com>

packages/api-client/models/ai.ts

@@ -6,3 +6,12 @@ export interface AISummaryModel {
   refId: string
   lang: string
 }
+
+export interface AIDeepReadingModel {
+  id: string
+  hash: string
+  refId: string
+  keyPoints: string[]
+  criticalAnalysis: string
+  content: string
+}