STATE-WP-0069: meter /progress workstream_id and fix MCP task queries

Wire hub-core progress legacy-meter hook for GET /progress/?workstream_id.
MCP list_tasks, list_blocked_tasks, and list_human_interventions now call
REST with workplan_id only so internal clients do not inflate legacy usage.

tests/test_legacy_meter.py

@@ -171,6 +171,24 @@ class TestWorkplanAliasesAndLegacyMeter:
         assert item["window"]["calls"] == 1
         assert item["window"]["components"] == {"old-task-client": 1}
 
+    async def test_legacy_workstream_id_query_param_on_progress_is_metered(self, client):
+        await _create_domain(client)
+        topic = await _create_topic(client)
+        wp = await _create_workplan(client, topic["id"])
+
+        r = await client.get(
+            f"/progress/?workstream_id={wp['id']}",
+            headers={"X-StateHub-Component": "old-progress-client"},
+        )
+        assert r.status_code == 200
+        assert r.headers["Deprecation"] == "true"
+        assert r.headers["X-StateHub-Replacement"] == "/progress/?workplan_id=<workplan_id>"
+
+        summary = (await client.get("/legacy-meter/summary")).json()
+        item = _summary_by_key(summary)["rest_api:GET /progress/?workstream_id"]
+        assert item["window"]["calls"] == 1
+        assert item["window"]["components"] == {"old-progress-client": 1}
+
     async def test_workplan_id_query_param_on_tasks_is_not_metered(self, client):
         await _create_domain(client)
         topic = await _create_topic(client)