fix(P0): Daytona sandbox use process/execute endpoint + add sourceType to writer doc_edit/translate

- Fix Daytona code execution endpoint from process/code-run (404) to process/execute
- Fix request body format to {command} with language-aware shell wrapping
- Add missing sourceType/confidence props to writer doc_edit and doc_translate ui.push

Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>

langgraph/src/agent/enterprise/tools/soc-client.ts

@@ -243,23 +243,29 @@ export async function sandboxRun(
 
   const t0 = Date.now();
   try {
-    // Execute code via Daytona Toolbox proxy
+    // Execute code via Daytona Toolbox proxy (process/execute endpoint)
+    const cmd =
+      language === "python"
+        ? `python3 -c '${code.replace(/'/g, "'\\''")}'`
+        : language === "javascript"
+          ? `node -e '${code.replace(/'/g, "'\\''")}'`
+          : code;
     const execResp = await fetch(
-      `https://proxy.app.daytona.io/toolbox/${sbId}/process/code-run`,
+      `https://proxy.app.daytona.io/toolbox/${sbId}/process/execute`,
       {
         method: "POST",
         headers,
-        body: JSON.stringify({ code, env: {}, timeout: 25000 }),
+        body: JSON.stringify({ command: cmd }),
         signal: AbortSignal.timeout(30000),
       },
     );
-    const execData: { exitCode?: number; result?: string; output?: string } =
+    const execData: { exitCode?: number; result?: string } =
       execResp.ok
         ? await execResp.json()
         : { exitCode: 1, result: "Exec failed" };
     return {
       exit_code: execData.exitCode ?? 0,
-      stdout: String(execData.result ?? execData.output ?? "").slice(0, 2000),
+      stdout: String(execData.result ?? "").slice(0, 2000),
       duration_ms: Date.now() - t0,
     };
   } finally {

langgraph/src/agent/writer/nodes/tool-executor.ts

@@ -152,6 +152,8 @@ export async function writerToolExecutorNode(
                 content: editedContent,
                 type: docType,
                 language: existing?.language ?? "",
+                sourceType: "generated_doc",
+                confidence: "high",
               },
             },
             { message: lastAiMessage },
@@ -207,6 +209,8 @@ export async function writerToolExecutorNode(
                 content: translatedContent,
                 type: docType,
                 language: existing?.language ?? "",
+                sourceType: "generated_doc",
+                confidence: "high",
               },
             },
             { message: lastAiMessage },