test(simulation): derivation-harness call sites + believability golden regen for coastline invention

Mechanical call-site updates (7) for the invent_primitives signature;
believability golden regenerated via UPDATE_GOLDEN=1. Deltas are
deliberate: slope_q/elev_q spreads widen, vegetation_classes +1
(Marine), water-districts-wet coherence reaches 46/46 and 19/19
(T-1082 class closed — classification and coastline are the same line).
Reductions (ocean_fraction distinct, morphology_zones on GJ244Ad)
are the eager pseudo-grid point-sampling coasts honestly instead of
area-averaging them into synthetic intermediates; believability
coast-sampling resolution is Q-123 calibration territory. All 37
derivation-harness law checks unchanged.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

server/tests/golden/believability.json

@@ -6,38 +6,38 @@
     "voxel_sampled_districts": 64,
     "contrast": {
       "moisture_q": {
-        "min": 32,
+        "min": 31,
         "max": 80,
-        "distinct": 49
+        "distinct": 48
       },
       "elev_q": {
         "min": 0,
-        "max": 98,
-        "distinct": 99
+        "max": 100,
+        "distinct": 101
       },
       "slope_q": {
         "min": 0,
-        "max": 13,
-        "distinct": 14
+        "max": 30,
+        "distinct": 30
       },
       "ocean_fraction_q": {
         "min": 0,
         "max": 100,
-        "distinct": 65
+        "distinct": 44
       },
       "morphology_zones": 9,
-      "vegetation_classes": 3,
+      "vegetation_classes": 4,
       "terrain_materials": 4,
-      "voxel_relief_m": 20,
+      "voxel_relief_m": 24,
       "micro_habitat_distinct": 2
     },
     "coherence": {
-      "water_districts": 49,
-      "water_districts_wet": 44,
+      "water_districts": 46,
+      "water_districts_wet": 46,
       "drainage_samples": 0,
       "drainage_monotonic": 0,
       "vegetation_samples": 64,
-      "vegetated_districts": 8
+      "vegetated_districts": 7
     }
   },
   {
@@ -49,32 +49,32 @@
       "moisture_q": {
         "min": 0,
         "max": 20,
-        "distinct": 21
+        "distinct": 20
       },
       "elev_q": {
         "min": 0,
-        "max": 99,
-        "distinct": 100
+        "max": 100,
+        "distinct": 101
       },
       "slope_q": {
         "min": 0,
-        "max": 6,
-        "distinct": 7
+        "max": 15,
+        "distinct": 14
       },
       "ocean_fraction_q": {
         "min": 0,
         "max": 100,
-        "distinct": 65
+        "distinct": 38
       },
-      "morphology_zones": 9,
-      "vegetation_classes": 1,
-      "terrain_materials": 4,
-      "voxel_relief_m": 19,
+      "morphology_zones": 6,
+      "vegetation_classes": 2,
+      "terrain_materials": 2,
+      "voxel_relief_m": 21,
       "micro_habitat_distinct": 0
     },
     "coherence": {
-      "water_districts": 25,
-      "water_districts_wet": 22,
+      "water_districts": 19,
+      "water_districts_wet": 19,
       "drainage_samples": 0,
       "drainage_monotonic": 0,
       "vegetation_samples": 64,