Fix ArgumentError for unknown field :phg in schema

The :phg field was being added as a map to packet attributes, but it's
not a database field. PHG data should be split into individual fields
(phg_power, phg_height, phg_gain, phg_directivity) which are actual
database columns.

Removed the :phg map from being added to attributes. The put_phg_fields
function already handles extracting individual PHG components.

Updated tests to check for individual PHG fields instead of the map.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

lib/aprsme/packet.ex

@@ -381,7 +381,7 @@ defmodule Aprsme.Packet do
     |> maybe_put(:course, data_extended[:course] || data_extended["course"])
     |> maybe_put(:speed, data_extended[:speed] || data_extended["speed"])
     |> maybe_put(:altitude, altitude)
-    |> maybe_put(:phg, phg)
+    # Don't add :phg to the map - it will be split into individual fields by put_phg_fields
     |> put_phg_fields(data_extended)
   end
 

test/aprsme/packet_parsing_test.exs

@@ -22,16 +22,15 @@ defmodule Aprsme.PacketParsingTest do
       # Verify altitude was extracted
       assert extracted_attrs[:altitude] == 680.0
 
-      # Verify PHG data was extracted
-      assert is_map(extracted_attrs[:phg])
+      # Verify PHG data was extracted into individual fields
       # PHG5 = 25W (5^2)
-      assert extracted_attrs[:phg][:power] == 25
+      assert extracted_attrs[:phg_power] == 25
       # PHG x5x = 320 ft
-      assert extracted_attrs[:phg][:height] == 320
+      assert extracted_attrs[:phg_height] == 320
       # PHG xx3 = 3 dBi
-      assert extracted_attrs[:phg][:gain] == 3
+      assert extracted_attrs[:phg_gain] == 3
       # PHG xxx0 = 0 degrees (not 360 for omni in our implementation)
-      assert extracted_attrs[:phg][:directivity] == 0
+      assert extracted_attrs[:phg_directivity] == 0
 
       # Verify comment has altitude and PHG removed
       assert extracted_attrs[:comment] == "Collin Cty Wide Digi"