Fix script execution logs being lost

- Add ScriptExecutionError class that preserves captured logs/queries
- IsolatedScriptExecutor: throw ScriptExecutionError with accumulated
  logs instead of plain Error on script failure
- ScriptExecutor (Python): same fix for Python execution errors
- testEndpoint: return captured logs/queries on script errors
- dynamicApiController: correctly extract scriptResult.result instead
  of stuffing entire IsolatedExecutionResult into rows; include logs
  in detailed_response output

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/src/controllers/dynamicApiController.ts

@@ -3,7 +3,7 @@ import { ApiKeyRequest } from '../middleware/apiKey';
 import { mainPool } from '../config/database';
 import { sqlExecutor } from '../services/SqlExecutor';
 import { scriptExecutor } from '../services/ScriptExecutor';
-import { EndpointParameter, ScriptQuery } from '../types';
+import { EndpointParameter, ScriptQuery, ScriptExecutionError } from '../types';
 
 export const executeDynamicEndpoint = async (req: ApiKeyRequest, res: Response) => {
   const startTime = Date.now();
@@ -202,9 +202,11 @@ export const executeDynamicEndpoint = async (req: ApiKeyRequest, res: Response)
       });
 
       result = {
-        rows: scriptResult,
+        rows: scriptResult.result,
         rowCount: 0,
         executionTime: 0,
+        scriptLogs: scriptResult.logs,
+        scriptQueries: scriptResult.queries,
       };
     } else {
       // Execute SQL query
@@ -241,6 +243,8 @@ export const executeDynamicEndpoint = async (req: ApiKeyRequest, res: Response)
           data: result.rows,
           rowCount: result.rowCount,
           executionTime: result.executionTime,
+          ...(result.scriptLogs && result.scriptLogs.length > 0 ? { logs: result.scriptLogs } : {}),
+          ...(result.scriptQueries && result.scriptQueries.length > 0 ? { queries: result.scriptQueries } : {}),
         }
       : result.rows;
 
@@ -267,9 +271,12 @@ export const executeDynamicEndpoint = async (req: ApiKeyRequest, res: Response)
   } catch (error: any) {
     console.error('Dynamic API execution error:', error);
 
-    const errorResponse = {
+    const isScriptError = error instanceof ScriptExecutionError;
+    const errorResponse: any = {
       success: false,
       error: error.message,
+      ...(isScriptError && error.logs.length > 0 ? { logs: error.logs } : {}),
+      ...(isScriptError && error.queries.length > 0 ? { queries: error.queries } : {}),
     };
 
     // Log error if needed