feat(schema): add group_settings and globally_verified_users tables

- Introduced new tables for managing group settings and globally verified users in the PostgreSQL schema.
- The group_settings table includes fields for chat_id, welcome_message, and updated_at.
- The globally_verified_users table includes fields for user_id and verified_at.

Author: MattiaFailla

schema.sql

@@ -41,3 +41,14 @@ CREATE TABLE IF NOT EXISTS reports (
     reason TEXT,
     created_at TIMESTAMPTZ DEFAULT NOW()
 );
+
+CREATE TABLE IF NOT EXISTS group_settings (
+    chat_id BIGINT PRIMARY KEY,
+    welcome_message TEXT,
+    updated_at TIMESTAMPTZ DEFAULT NOW()
+);
+
+CREATE TABLE IF NOT EXISTS globally_verified_users (
+    user_id BIGINT PRIMARY KEY,
+    verified_at TIMESTAMPTZ DEFAULT NOW()
+);