Lots of new AI tasks tweaks and fixes

inventory-server/src/routes/ai.js

@@ -409,8 +409,12 @@ router.post('/validate/sanity-check', async (req, res) => {
       return res.status(400).json({ error: 'Products array is required' });
     }
 
+    // Get pool from app.locals (set by server.js)
+    const pool = req.app.locals.pool;
+
     const result = await aiService.runTask(aiService.TASK_IDS.SANITY_CHECK, {
-      products
+      products,
+      pool
     });
 
     if (!result.success) {