feat: vampire syncNewContent injection and grant-eternal-sovereignty debug endpoint

Adds vampire parity with existing goddess debug tooling:
- `SyncNewContentResponse` type gains vampire count fields
- `syncNewContent` injects missing vampire content arrays for players
  who have entered the vampire realm (achievements, bosses, equipment,
  exploration areas, quests, thralls, upgrades, zones)
- `/grant-eternal-sovereignty` debug endpoint mirrors `/grant-apotheosis`,
  setting `vampire.eternalSovereignty.count = 1` for saves that need it
- Full test coverage for all new paths in debug.spec.ts

packages/types/src/interfaces/api.ts

@@ -604,6 +604,46 @@ interface SyncNewContentResponse {
    */
   goddessZonesAdded: number;
 
+  /**
+   * Number of vampire achievements added to the save.
+   */
+  vampireAchievementsAdded: number;
+
+  /**
+   * Number of vampire bosses added to the save.
+   */
+  vampireBossesAdded: number;
+
+  /**
+   * Number of vampire thralls added to the save.
+   */
+  vampireThrallsAdded: number;
+
+  /**
+   * Number of vampire equipment items added to the save.
+   */
+  vampireEquipmentAdded: number;
+
+  /**
+   * Number of vampire exploration areas added to the save.
+   */
+  vampireExplorationAreasAdded: number;
+
+  /**
+   * Number of vampire quests added to the save.
+   */
+  vampireQuestsAdded: number;
+
+  /**
+   * Number of vampire upgrades added to the save.
+   */
+  vampireUpgradesAdded: number;
+
+  /**
+   * Number of vampire zones added to the save.
+   */
+  vampireZonesAdded: number;
+
   /**
    * HMAC-SHA256 signature of the updated state for anti-cheat chain continuity.
    */