fix: Correct relative path to exercises.json from exerciseRecommendations.js

backend/src/routes/exerciseRecommendations.js

@@ -1,6 +1,6 @@
 const express = require('express');
 
-const exercisesData = require('./data/exercises.json');
+const exercisesData = require('../data/exercises.json');
 
 const OLLAMA_URL = process.env.OLLAMA_URL || 'http://localhost:11434';
 const OLLAMA_MODEL = process.env.OLLAMA_MODEL || 'deepseek-v3.2:cloud';