docs: Update privacy policy

PRIVACY.md

@@ -8,7 +8,7 @@ Thank you for using Hoyo Buddy! This Privacy Policy describes how Hoyo Buddy col
 
 Hoyo Buddy collects and stores Cookies provided by users to ensure the functionality of commands that require access to the user's information on HoYoLAB. For concerns regarding account security, please refer to the [Account Security Page](https://github.com/seriaati/hoyo-buddy/wiki/Account-Security) on the Wiki.
 
-### Usage Data
+### User Data
 
 Hoyo Buddy collects and stores usage data to improve the quality of the service. This includes, but is not limited to, the following:
 
@@ -19,9 +19,25 @@ Hoyo Buddy collects and stores usage data to improve the quality of the service.
 - Spiral abyss data (for leaderboard and statistics features)
 - In-game statistics (e.g. achievements, exploration progress, etc. for leaderboard features)
 - Game account usernames and UIDs
-- Number of Times a Command is Used (not associated with user ID)
 - Last time a command was used by the user (to delete data of inactive users)
-- Full and always updated list can be found in the [Source Code](https://github.com/seriaati/hoyo-buddy/blob/main/hoyo_buddy/db/models.py)
+
+Full and always updated list can be found in the [Source Code](https://github.com/seriaati/hoyo-buddy/blob/main/hoyo_buddy/db/models.py)
+
+### Metrics
+
+Hoyo Buddy collects and stores metrics data to improve the quality of the service. Most data are anonymized and cannot be used to identify a user. This includes, but is not limited to, the following:
+
+- Command usage
+- Component interaction usage (e.g. button clicks, dropdown selections, etc.)
+- Guild count (does not include guild information and member information)
+- Error logs (powered by [Sentry](https://sentry.io), might contain user IDs and data that can be used to infer how you interacted with the bot, only used for debugging purposes)
+- Image generation time
+
+Full and always updated list can be found in the [Source Code](https://github.com/seriaati/hoyo-buddy/blob/main/hoyo_buddy/cogs/metrics.py)
+
+## Requesting Data Deletion
+
+Data related to Hoyoverse accounts can be deleted by removing your accounts with the `/accounts` command. If you want to delete all data related to your Discord account, contact me on [Discord](discord.com/users/410036441129943050).
 
 ## Information We Share