feat: add is_vanished column to users table

Author: vikashsiwach

migrations/20260410_230000_add_is_vanished_to_users_table.js

@@ -0,0 +1,30 @@
+exports.up = async function (knex) {
+  await knex.schema.alterTable('users', (table) => {
+    table.boolean('is_vanished').notNullable().defaultTo(false)
+  })
+
+  await knex.raw(`
+    UPDATE users u
+    SET is_vanished = true
+    FROM events e
+    WHERE u.pubkey = e.event_pubkey
+      AND e.event_kind = 62
+      AND e.deleted_at IS NULL
+  `)
+
+  await knex.raw(`
+    INSERT INTO users (pubkey, is_admitted, balance, is_vanished, created_at, updated_at)
+    SELECT DISTINCT e.event_pubkey, false, 0, true, NOW(), NOW()
+    FROM events e
+    LEFT JOIN users u ON u.pubkey = e.event_pubkey
+    WHERE e.event_kind = 62
+      AND e.deleted_at IS NULL
+      AND u.pubkey IS NULL
+  `)
+}
+
+exports.down = function (knex) {
+  return knex.schema.alterTable('users', (table) => {
+    table.dropColumn('is_vanished')
+  })
+}