feat(schema): add bot_chats and global_bans tables

- Introduced new tables for managing bot chat records and global bans in the PostgreSQL schema.
- The bot_chats table includes fields for chat_id and added_at.
- The global_bans table includes fields for user_id, admin_id, reason, and created_at.

Author: MattiaFailla

schema.sql

@@ -52,3 +52,15 @@ CREATE TABLE IF NOT EXISTS globally_verified_users (
     user_id BIGINT PRIMARY KEY,
     verified_at TIMESTAMPTZ DEFAULT NOW()
 );
+
+CREATE TABLE IF NOT EXISTS bot_chats (
+    chat_id BIGINT PRIMARY KEY,
+    added_at TIMESTAMPTZ DEFAULT NOW()
+);
+
+CREATE TABLE IF NOT EXISTS global_bans (
+    user_id BIGINT PRIMARY KEY,
+    admin_id BIGINT NOT NULL,
+    reason TEXT,
+    created_at TIMESTAMPTZ DEFAULT NOW()
+);