feat: add optional asset gateway control plane

db.mjs

@@ -96,6 +96,35 @@ async function ensureForeignKeyDeleteRule(
   );
 }
 
+/** Creates only the optional asset control-plane tables needed by memind_adm. */
+export async function ensureAssetGatewaySchema(pool) {
+  await pool.query(`
+    CREATE TABLE IF NOT EXISTS h5_asset_gateway_config (
+      config_key VARCHAR(32) PRIMARY KEY,
+      enabled TINYINT(1) NOT NULL DEFAULT 0,
+      updated_by CHAR(36) NULL,
+      updated_at BIGINT NOT NULL
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci
+  `);
+  await pool.query(`
+    CREATE TABLE IF NOT EXISTS h5_asset_plugin_configs (
+      id CHAR(36) PRIMARY KEY,
+      plugin_id VARCHAR(64) NOT NULL,
+      enabled TINYINT(1) NOT NULL DEFAULT 0,
+      provider VARCHAR(64) NULL,
+      llm_provider_key_id CHAR(36) NULL,
+      llm_model VARCHAR(128) NULL,
+      updated_by CHAR(36) NULL,
+      created_at BIGINT NOT NULL,
+      updated_at BIGINT NOT NULL,
+      UNIQUE KEY uq_h5_asset_plugin (plugin_id),
+      KEY idx_h5_asset_plugin_llm_provider (llm_provider_key_id),
+      CONSTRAINT fk_h5_asset_plugin_llm_provider FOREIGN KEY (llm_provider_key_id)
+        REFERENCES h5_llm_provider_keys(id) ON DELETE SET NULL
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci
+  `);
+}
+
 export async function migrateSchema(pool) {
   const renames = [
     ['h5_user_sessions', 'goose_session_id', 'agent_session_id'],
@@ -217,6 +246,10 @@ export async function migrateSchema(pool) {
     ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci
   `);
 
+  // Optional asset capability control plane. These rows configure no runtime
+  // worker by themselves; the existing chat/page path remains independent.
+  await ensureAssetGatewaySchema(pool);
+
   // Shared experience store (etat C). Keep in sync with schema.sql.
   await pool.query(`
     CREATE TABLE IF NOT EXISTS h5_experience (