Morphia call fixes; add @Entity to more classes

1. During the conversion of Morphia calls to the new API, some of the `Filter.eq()` calls had their `field` set to `playerId` due to a copy/paste typo.

2. Morphia 2 switches to the codec system, so anything that will be serialized in the pipeline requires the `@Entity` annotation.

src/main/java/emu/grasscutter/game/gacha/PlayerGachaInfo.java

@@ -1,5 +1,8 @@
 package emu.grasscutter.game.gacha;
 
+import dev.morphia.annotations.Entity;
+
+@Entity
 public class PlayerGachaInfo {
 	private PlayerGachaBannerInfo standardBanner;
 	private PlayerGachaBannerInfo eventCharacterBanner;