chore(scorer): apply recalibrated factor weights from gradient descent fit

Refit on the current contact corpus via mix recalibrate_scorer (val loss
0.140 vs 0.146 train, initial 0.434). Mostly small adjustments — the
notable shifts are time_of_day −0.0116 (now the smallest factor) and
rain +0.0069 (continues to be the largest single weight).

Sums to 1.0 (within rounding); per-band overrides not affected.

lib/microwaveprop/propagation/band_config.ex

@@ -15,16 +15,16 @@ defmodule Microwaveprop.Propagation.BandConfig do
   # (50/144 MHz with 0 contacts, 47+ GHz with <200 matches) inherit this
   # vector.
   @weights %{
-    humidity: 0.1243,
-    time_of_day: 0.0496,
-    td_depression: 0.0978,
-    refractivity: 0.1049,
-    sky: 0.08,
-    season: 0.1112,
-    wind: 0.08,
-    rain: 0.1362,
-    pressure: 0.1032,
-    pwat: 0.1128
+    humidity: 0.1262,
+    time_of_day: 0.0380,
+    td_depression: 0.1010,
+    refractivity: 0.0986,
+    sky: 0.0841,
+    season: 0.1134,
+    wind: 0.0841,
+    rain: 0.1431,
+    pressure: 0.0967,
+    pwat: 0.1147
   }
 
   @sunrise_table [7.4, 7.3, 7.0, 6.7, 6.35, 6.25, 6.35, 6.65, 6.9, 7.1, 7.35, 7.45]

test/microwaveprop/propagation/band_config_test.exs

@@ -230,16 +230,16 @@ defmodule Microwaveprop.Propagation.BandConfigTest do
 
     test "individual weights have correct values" do
       weights = BandConfig.weights()
-      assert weights.humidity == 0.1243
-      assert weights.time_of_day == 0.0496
-      assert weights.td_depression == 0.0978
-      assert weights.refractivity == 0.1049
-      assert weights.sky == 0.08
-      assert weights.season == 0.1112
-      assert weights.wind == 0.08
-      assert weights.rain == 0.1362
-      assert weights.pwat == 0.1128
-      assert weights.pressure == 0.1032
+      assert weights.humidity == 0.1262
+      assert weights.time_of_day == 0.0380
+      assert weights.td_depression == 0.1010
+      assert weights.refractivity == 0.0986
+      assert weights.sky == 0.0841
+      assert weights.season == 0.1134
+      assert weights.wind == 0.0841
+      assert weights.rain == 0.1431
+      assert weights.pwat == 0.1147
+      assert weights.pressure == 0.0967
     end
   end