Adds polymer spectra database and improves recommendation methods

Introduces a new polymer spectra database to enhance data availability.

Refactors the learning recommendations methods for improved clarity and functionality, changing method names for consistency and better access.

No functional changes to the logic, solely improves code maintainability.

modules/advanced_spectroscopy.py

@@ -2,7 +2,7 @@
 Support dual FTIR + Raman spectroscopy with ATR-FTIR integration"""
 
 import numpy as np
-from scipy.integrate import trapz
+from scipy.integrate import trapezoid as trapz
 from typing import Dict, List, Tuple, Optional, Any
 from dataclasses import dataclass
 from scipy import signal

modules/educational_framework.py

@@ -557,7 +557,7 @@ class EducationalFramework:
             "score": score,
             "feedback": feedback,
             "level": self.current_user.current_level,
-            "recommendations": self._get_learning_recommendations(),
+            "recommendations": self.get_learning_recommendations(),
         }
 
     def get_personalized_learning_path(
@@ -599,7 +599,7 @@ class EducationalFramework:
 
         return result
 
-    def _get_learning_recommendations(self) -> List[str]:
+    def get_learning_recommendations(self) -> List[str]:
         """Get learning recommendations based on current progress"""
         recommendations = []