feat(campaign): default the quote wall on for every campaign

db/migrations/20260617000200_alter_campaign_enable_quote_wall_default_on.js

@@ -0,0 +1,20 @@
+const table = 'campaign'
+
+// Interim decision: open the quote wall for every campaign by default, instead
+// of the original 七日書-only opt-in. The per-campaign `enable_quote_wall` flag
+// is kept (as a future hook for the OSS toggle / 七日書-only restriction); we
+// only flip its default to true and enable it on all existing campaigns.
+export const up = async (knex) => {
+  await knex.schema.alterTable(table, (t) => {
+    t.boolean('enable_quote_wall').notNullable().defaultTo(true).alter()
+  })
+  await knex(table).update({ enable_quote_wall: true })
+}
+
+export const down = async (knex) => {
+  // revert the default; existing per-campaign values are left as-is (the prior
+  // mixed state cannot be reconstructed)
+  await knex.schema.alterTable(table, (t) => {
+    t.boolean('enable_quote_wall').notNullable().defaultTo(false).alter()
+  })
+}