emotes.media_url and media_asset_id (Live's Media asset sync), added to existing databases on boot

ddiff --git a/server/db/database.js b/server/db/database.js
iindex 20a2df5..da9c3a4 100644
---- a/server/db/database.js
++++ b/server/db/database.js
@@@ -100,9 +100,19 @@ function close() {
   * every change to Chat's tables for the Live mirror — the service does; the importer does not,
   * so imported rows (which came from Live) are never sent back.
   */
++const ADDED_COLUMNS = [
++    ['emotes', 'media_url', 'TEXT'],          // Live: emote images synced to OpenVibe.Media
++    ['emotes', 'media_asset_id', 'INTEGER'],
++];
++
  function initDb({ captureMirror = false } = {}) {
      const d = getDb();
      d.exec(fs.readFileSync(path.join(__dirname, 'schema.sql'), 'utf8'));
++    // Columns Live added after a Chat database was created (CREATE TABLE IF NOT EXISTS does not add them).
++    for (const [table, column, type] of ADDED_COLUMNS) {
++        const have = d.prepare(`PRAGMA table_info(${table})`).all().some((c) => c.name === column);
++        if (!have) d.exec(`ALTER TABLE ${table} ADD COLUMN ${column} ${type}`);
++    }
      const upsertAuth = d.prepare('INSERT INTO table_authority (table_name, authority, note) VALUES (?, ?, ?) ON CONFLICT(table_name) DO UPDATE SET authority = excluded.authority, note = excluded.note');
      for (const t of Object.keys(CHAT_TABLES)) upsertAuth.run(t, 'chat', 'Chat writes; Live keeps a read mirror');
      for (const [t, note] of Object.entries(STAGED_TABLES)) upsertAuth.run(t, 'live', note);
ddiff --git a/server/db/schema.sql b/server/db/schema.sql
iindex 02b0d84..b98a21c 100644
---- a/server/db/schema.sql
++++ b/server/db/schema.sql
@@@ -256,7 +256,9 @@ CREATE TABLE IF NOT EXISTS emotes (
      is_approved INTEGER DEFAULT 1,
      created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
      channel_owner_id INTEGER,
--    size INTEGER DEFAULT 100
++    size INTEGER DEFAULT 100,
++    media_url TEXT,
++    media_asset_id INTEGER
  );
  CREATE INDEX IF NOT EXISTS idx_emotes_user ON emotes(user_id);
  CREATE INDEX IF NOT EXISTS idx_emotes_channel_owner ON emotes(channel_owner_id);