feat(migration): migrate legacy owner data and update config reference handling

- Implemented a migration process to move resources from the legacy owner "default" to the new default owner "local", ensuring no data loss during the transition.
- Updated configuration reference handling to replace legacy `$VAR_`, `$SECRET_`, and `$CONTEXT_` prefixes with mustache-style `{{ vars.name }}`, `{{ secrets.name }}`, and `{{ context.name }}`.
- Enhanced YAML configuration files and scripts to reflect the new mustache syntax, improving consistency across the application.
- Added tests to validate the migration process and ensure proper handling of legacy references.
- Updated documentation to guide users on the new configuration reference format.

packages/server/package.json

@@ -17,7 +17,9 @@
     "test:workflow-history": "JFLOW_WORKFLOWS_DIR=./data/workflow-history-smoke JFLOW_DB_PATH=./data/workflow-history-smoke.db node test/workflow-history-smoke.js",
     "reset-admin": "node reset-admin.js",
     "test:profiles": "node test/profiles-smoke.js",
-    "test:set-dry-run": "node test/set-dry-run-smoke.js"
+    "test:set-dry-run": "node test/set-dry-run-smoke.js",
+    "test:config-refs": "node test/config-refs-smoke.js",
+    "test:owner-migrate": "node test/owner-migrate-smoke.js"
   },
   "dependencies": {
     "@jerapah-flow/shared": "workspace:*",