Phase 5: API fixes and validation testing

[skyelaird]

Resolves all remaining API integration issues between Phase 4 and Phase 5 components:

Fixed API Mismatches:

1. CircuitMuf vs MufCalculator (prediction_engine.py:180)

   • Changed from using CircuitMuf (dataclass) to MufCalculator (calculator class)
   • Added circuit_muf attribute to store CircuitMuf results
   • Updated all references from muf_calculator.muf to circuit_muf.muf
   • Updated all references from muf_calculator.muf_info to circuit_muf.muf_info

2. Layer Attribute Names (prediction_engine.py, muf_calculator.py)

   • Changed prof.e_layer → prof.e
   • Changed prof.f1_layer → prof.f1
   • Changed prof.f2_layer → prof.f2
   • Standardized across all profile creation and access patterns

3. Gyro Frequency Attribute (prediction_engine.py)

   • Changed prof.gyro_frequency → prof.gyro_freq
   • Aligned with IonosphericProfile attribute naming

4. Method Names (muf_calculator.py, ionospheric_profile.py)

   • Fixed compute_electron_density_profile() → compute_el_density_profile()
   • Removed angle_count parameter from compute_oblique_frequencies()
   • Added stub compute_derivative_loss() method for future implementation

5. Dictionary Key Types (prediction_engine.py)

   • Changed muf_info[layer.value] → muf_info[layer.name]
   • Fixed KeyError by using string keys ('E', 'F1', 'F2')

6. Distribution Attributes (prediction_engine.py)

   • Fixed excessive_loss.value.median → excessive_loss.median
   • Fixed excessive_loss.value.lower → excessive_loss.lo
   • Fixed excessive_loss.value.upper → excessive_loss.hi

7. Reflectrix Parameters (prediction_engine.py)

   • Changed frequency= → freq= in Reflectrix constructor

8. Error Handling (prediction_engine.py)

   • Added None check for find_modes() return value

Testing:

• All syntax checks pass
• Created test_phase5_api.py for verification
• Successfully runs end-to-end prediction with correct results
• Circuit MUF computation works correctly
• Profile attributes properly standardized

The prediction engine now successfully integrates all Phase 1-5 components.