STATE-WP-0069 T03: normalize MCP progress events to workplan_id

_emit_progress_event strips legacy workstream_id from POST /progress/
payloads. Task and decision side-effect events now set workplan_id
explicitly so automatic progress logging stays workplan-first.

tests/test_mcp_write_tools.py

@@ -128,6 +128,8 @@ class TestMCPWriteTools:
         }
         assert [path for path, _ in calls] == ["/tasks", "/progress"]
         assert calls[1][1]["task_id"] == "task-1"
+        assert calls[1][1]["workplan_id"] == "ws-1"
+        assert "workstream_id" not in calls[1][1]
         assert calls[1][1]["event_type"] == "task_created"
 
     async def test_update_task_status_api_error_is_clear_and_skips_progress(self, monkeypatch):
@@ -183,6 +185,8 @@ class TestMCPWriteTools:
         }
         assert [path for path, _ in post_calls] == ["/progress"]
         assert post_calls[0][1]["task_id"] == "task-1"
+        assert post_calls[0][1]["workplan_id"] == "ws-1"
+        assert "workstream_id" not in post_calls[0][1]
         assert post_calls[0][1]["event_type"] == "task_status_changed"
 
     async def test_add_progress_event_accepts_json_string_detail(self, monkeypatch):
@@ -372,6 +376,7 @@ class TestMCPWriteTools:
         assert body["id"] == "decision-1"
         assert calls[0][1]["workplan_id"] == "wp-1"
         assert calls[1][1]["workplan_id"] == "wp-1"
+        assert "workstream_id" not in calls[1][1]
 
     async def test_list_blocked_tasks_accepts_workplan_id_alias(self, monkeypatch):
         captured: dict[str, Any] = {}
@@ -386,7 +391,7 @@ class TestMCPWriteTools:
         await _call_tool("list_blocked_tasks", {"workplan_id": "wp-1"})
 
         assert captured["params"]["workplan_id"] == "wp-1"
-        assert captured["params"]["workstream_id"] == "wp-1"
+        assert "workstream_id" not in captured["params"]
 
     async def test_record_token_event_accepts_workplan_id_alias(self, monkeypatch):
         calls: list[tuple[str, dict[str, Any]]] = []