fix: remove invalid src.core import from spectral analyzer

- Replaced non-existent get_logger import with standard Python logging
- Fixed ModuleNotFoundError preventing models API from loading
- Now uses logging.getLogger instead of custom logger

src/models/spectral_analysis/analyzer.py

@@ -15,11 +15,10 @@ from scipy.fft import fft, fftfreq, ifft, rfft, rfftfreq
 from scipy.signal import find_peaks, welch, periodogram, spectrogram
 from scipy.stats import zscore
 import warnings
+import logging
 warnings.filterwarnings('ignore')
 
-from src.core import get_logger
-
-logger = get_logger(__name__)
+logger = logging.getLogger(__name__)
 
 
 @dataclass