refactor(config): remove legacy config reference handling and streamline YAML management

- Deleted legacy config reference handling functions and related migration scripts to simplify the codebase.
- Updated documentation to reflect the removal of legacy YAML paths and configurations.
- Adjusted existing YAML management processes to ensure compatibility with the new mustache-style syntax.
- Removed tests related to legacy config references, focusing on current functionality and ensuring clarity in the testing suite.

packages/server/start-app.js

@@ -31,8 +31,6 @@ import {
   getRedisUrlForLog,
 } from "./workflow-queue.js";
 import { purgeExpiredTrash } from "./workflow-trash.js";
-import { migrateLegacyWorkflowsIfNeeded } from "./workflow-migrate.js";
-import { migrateDefaultOwnerIfNeeded } from "./owner-migrate.js";
 import {
   getConfigGeneration,
   startHeartbeatLoop,
@@ -130,18 +128,6 @@ export async function startApp(opts = {}) {
     }
   });
 
-  try {
-    migrateLegacyWorkflowsIfNeeded();
-  } catch (err) {
-    log.warn({ err }, "legacy workflow migrate failed");
-  }
-
-  try {
-    await migrateDefaultOwnerIfNeeded();
-  } catch (err) {
-    log.warn({ err }, "owner default→local migrate failed");
-  }
-
   const registry = createRegistry(server, {
     queue: workflowQueue,
     // Cron + HTTP triggers enqueue jobs; only the API process may own them.