feat(server): enhance script execution and workflow management

- Introduced compileWorkflowScripts function to parse and validate workflow scripts, supporting both linear and DAG execution modes.
- Added runLinearSteps and runDagSteps functions for executing compiled workflows based on their structure.
- Updated createRegistry function to utilize the new workflow compilation and execution logic.
- Enhanced script sandbox with meta extraction and instantiation capabilities for better script management.
- Improved API endpoints to return script metadata and handle errors more effectively.
- Removed deprecated scripts and updated workflows to reflect new structure and functionality.

packages/server/src/api/workflows.js

@@ -1,7 +1,11 @@
 import yaml from "yaml";
 import * as store from "../../store.js";
 import * as fsStore from "../../fs-store.js";
-import { namespacedPath, parseScriptStep } from "../../workflow-parse.js";
+import {
+  compileWorkflowScripts,
+  namespacedPath,
+  parseScriptStep,
+} from "../../workflow-parse.js";
 
 function triggerSummary(owner, workflow) {
   if (!workflow || typeof workflow !== "object") return [];
@@ -160,13 +164,21 @@ export default function workflowsPluginFactory(registry) {
       if (typeof body.content !== "string") {
         return reply.code(400).send({ error: "content is required" });
       }
+      let parsed;
       try {
-        yaml.parse(body.content);
+        parsed = yaml.parse(body.content);
       } catch (err) {
         return reply.code(400).send({
           error: `invalid yaml: ${err instanceof Error ? err.message : String(err)}`,
         });
       }
+      try {
+        compileWorkflowScripts(parsed?.scripts);
+      } catch (err) {
+        return reply.code(400).send({
+          error: err instanceof Error ? err.message : String(err),
+        });
+      }
       const existed = fsStore.readWorkflowYaml(owner, file) != null;
       fsStore.writeWorkflowYaml(owner, file, body.content);
       const registered = fsStore.readRegisters(owner);