feat: add bitrateMatrixOverrides to types, schema, and migration

packages/server/src/db/migrate.ts

@@ -79,7 +79,8 @@ export function runMigrations(db: Database.Database): void {
         { name: 'instance_name', type: "TEXT DEFAULT 'Backspace'" },
         { name: 'worker_id', type: 'INTEGER' },
         { name: 'discovery_enabled', type: 'INTEGER NOT NULL DEFAULT 1' },
-        { name: 'registration_open', type: 'INTEGER' }
+        { name: 'registration_open', type: 'INTEGER' },
+        { name: 'bitrate_matrix_overrides', type: 'TEXT DEFAULT NULL' }
       ]
     },
     {

packages/server/src/db/schema.ts

@@ -258,6 +258,7 @@ export const instanceSettings = sqliteTable('instance_settings', {
   maxFramerate: integer('max_framerate').notNull().default(60),
   registrationOpen: integer('registration_open'),  // null = use env var default, 0/1 = explicit
   gifApiKey: text('gif_api_key'),
+  bitrateMatrixOverrides: text('bitrate_matrix_overrides'),
   updatedAt: integer('updated_at').notNull(),
 });