[server] Add timeout while fetching embedding (#1676)

## Description

## Tests

server/pkg/controller/embedding/controller.go

@@ -2,12 +2,14 @@ package embedding
 
 import (
 	"bytes"
+	"context"
 	"encoding/json"
 	"errors"
 	"fmt"
 	"github.com/ente-io/museum/pkg/utils/array"
 	"strconv"
 	"sync"
+	gTime "time"
 
 	"github.com/aws/aws-sdk-go/aws"
 	"github.com/aws/aws-sdk-go/service/s3"
@@ -306,7 +308,7 @@ func (c *Controller) getEmbeddingObjectsParallel(objectKeys []string) ([]ente.Em
 			defer wg.Done()
 			defer func() { <-globalDiffFetchSemaphore }() // Release back to global semaphore
 
-			obj, err := c.getEmbeddingObject(objectKey, downloader)
+			obj, err := c.getEmbeddingObject(context.Background(), objectKey, downloader)
 			if err != nil {
 				errs = append(errs, err)
 				log.Error("error fetching embedding object: "+objectKey, err)
@@ -343,7 +345,9 @@ func (c *Controller) getEmbeddingObjectsParallelV2(userID int64, dbEmbeddingRows
 			defer wg.Done()
 			defer func() { <-globalFileFetchSemaphore }() // Release back to global semaphore
 			objectKey := c.getObjectKey(userID, dbEmbeddingRow.FileID, dbEmbeddingRow.Model)
-			obj, err := c.getEmbeddingObject(objectKey, downloader)
+			ctx, cancel := context.WithTimeout(context.Background(), gTime.Second*10) // 10 seconds timeout
+			defer cancel()
+			obj, err := c.getEmbeddingObjectWithRetries(ctx, objectKey, downloader, 0)
 			if err != nil {
 				log.Error("error fetching embedding object: "+objectKey, err)
 				embeddingObjects[i] = embeddingObjectResult{
@@ -363,21 +367,21 @@ func (c *Controller) getEmbeddingObjectsParallelV2(userID int64, dbEmbeddingRows
 	return embeddingObjects, nil
 }
 
-func (c *Controller) getEmbeddingObject(objectKey string, downloader *s3manager.Downloader) (ente.EmbeddingObject, error) {
-	return c.getEmbeddingObjectWithRetries(objectKey, downloader, 3)
+func (c *Controller) getEmbeddingObject(ctx context.Context, objectKey string, downloader *s3manager.Downloader) (ente.EmbeddingObject, error) {
+	return c.getEmbeddingObjectWithRetries(ctx, objectKey, downloader, 3)
 }
 
-func (c *Controller) getEmbeddingObjectWithRetries(objectKey string, downloader *s3manager.Downloader, retryCount int) (ente.EmbeddingObject, error) {
+func (c *Controller) getEmbeddingObjectWithRetries(ctx context.Context, objectKey string, downloader *s3manager.Downloader, retryCount int) (ente.EmbeddingObject, error) {
 	var obj ente.EmbeddingObject
 	buff := &aws.WriteAtBuffer{}
-	_, err := downloader.Download(buff, &s3.GetObjectInput{
+	_, err := downloader.DownloadWithContext(ctx, buff, &s3.GetObjectInput{
 		Bucket: c.S3Config.GetHotBucket(),
 		Key:    &objectKey,
 	})
 	if err != nil {
 		log.Error(err)
 		if retryCount > 0 {
-			return c.getEmbeddingObjectWithRetries(objectKey, downloader, retryCount-1)
+			return c.getEmbeddingObjectWithRetries(ctx, objectKey, downloader, retryCount-1)
 		}
 		return obj, stacktrace.Propagate(err, "")
 	}