Fix softcore branch pose seeding

tools/prompt_route_simulation.py

@@ -1258,7 +1258,7 @@ def _pair_seed_pose_reroll_check(seed: int) -> dict[str, Any]:
         seed,
         name="pair_seed.pose_reroll",
         reroll_axis="pose",
-        changed_fields=("hard_position_key", "hard_item", "hard_source_role_graph"),
+        changed_fields=("soft_pose", "hard_position_key", "hard_item", "hard_source_role_graph"),
         stable_fields=(
             "shared_cast_descriptors",
             "soft_cast_descriptor_text",
@@ -1266,7 +1266,6 @@ def _pair_seed_pose_reroll_check(seed: int) -> dict[str, Any]:
             "soft_scene_text",
             "hard_scene_text",
             "soft_item",
-            "soft_pose",
             "soft_composition",
             "hard_composition",
         ),
@@ -1279,13 +1278,14 @@ def _pair_seed_content_reroll_check(seed: int) -> dict[str, Any]:
         seed,
         name="pair_seed.content_reroll",
         reroll_axis="content",
-        changed_fields=("soft_item", "soft_pose"),
+        changed_fields=("soft_item",),
         stable_fields=(
             "shared_cast_descriptors",
             "soft_cast_descriptor_text",
             "hard_cast_descriptor_text",
             "soft_scene_text",
             "hard_scene_text",
+            "soft_pose",
             "hard_item",
             "hard_position_key",
             "hard_source_role_graph",