Fix db migration issue

Author: zjn0505

xkcd/objectbox-models/default.json

@@ -26,15 +26,15 @@
         },
         {
           "id": "5:7047913805660868881",
-          "name": "title"
+          "name": "_title"
         },
         {
           "id": "6:6826620300502689902",
           "name": "img"
         },
         {
           "id": "7:9035471003790175147",
-          "name": "alt"
+          "name": "_alt"
         },
         {
           "id": "10:4122283148199933474",

xkcd/objectbox-models/default.json.bak

@@ -34,7 +34,7 @@
         },
         {
           "id": "7:9035471003790175147",
-          "name": "alt"
+          "name": "_alt"
         },
         {
           "id": "10:4122283148199933474",
@@ -51,10 +51,6 @@
         {
           "id": "14:9125666023352709174",
           "name": "hasThumbed"
-        },
-        {
-          "id": "15:4531149468420226174",
-          "name": "thumbCount"
         }
       ],
       "relations": []
@@ -153,7 +149,8 @@
     7914150310476867013,
     4606230756309457134,
     6782987198030462947,
-    5092884225282829685
+    5092884225282829685,
+    4531149468420226174
   ],
   "retiredRelationUids": [],
   "version": 1

xkcd/src/main/java/xyz/jienan/xkcd/model/XkcdPic.kt

@@ -5,7 +5,7 @@ import androidx.core.text.HtmlCompat
 import com.google.gson.annotations.SerializedName
 import io.objectbox.annotation.Entity
 import io.objectbox.annotation.Id
-import io.objectbox.annotation.NameInDb
+import io.objectbox.annotation.Uid
 import xyz.jienan.xkcd.model.util.XkcdSideloadUtils
 import java.io.Serializable
 
@@ -20,7 +20,7 @@ data class XkcdPic constructor(
         val day: String = "",
         @Id(assignable = true)
         var num: Long = 0L,
-        @NameInDb("alt")
+        @Uid(9035471003790175147L)
         @SerializedName("alt")
         val _alt: String = "",
         var width: Int = 0,
@@ -29,7 +29,7 @@ data class XkcdPic constructor(
         var hasThumbed: Boolean = false,
         @io.objectbox.annotation.Transient
         val thumbCount: Long = 0L,
-        @NameInDb("title")
+        @Uid(7047913805660868881L)
         @SerializedName("title")
         val _title: String = "",
         var img: String = "",