fix(tests): per-project Plane states in webhook tests + close CI hole (ORCH-39)

After ORCH-10 the webhook resolves Plane state UUIDs per-project via
get_project_states(project_id). The m6/plane webhook tests hardcoded the
enduro in_progress UUID for ORCH-project payloads, so the pipeline never
started and task creation assertions failed.

Tests:
- Mock get_project_states with a deterministic per-project ET/ORCH map (no
  network) and reset _STATES_CACHE via reload_project_states() per test.
- Send each request with the in_progress UUID that matches its own project.

CI hole:
- requirements.txt lacked pytest-asyncio, so the 6 @pytest.mark.asyncio tests
  in test_orch10_states.py were SILENTLY SKIPPED -> CI green while async paths
  never ran. Add pytest-asyncio + pytest.ini (asyncio_mode=auto, strict
  markers); harden ci.yml (set -euo pipefail, --strict-markers) so any failure
  or unknown marker reds the build and the whole suite runs.

src/ unchanged (per-project resolving is the ORCH-10 feature, kept as-is).

tests/test_m6_sequence.py

@@ -34,6 +34,27 @@ import src.plane_sync as plane_sync  # noqa: E402
 ORCH_PLANE_ID = "8da6aa25-a60e-44d6-a1e2-d8ae59aa7d6a"
 ENDURO_PLANE_ID = "7a79f0a9-5278-49cd-9007-9a338f238f9c"
 
+# ORCH-39: after ORCH-10 the webhook resolves Plane state UUIDs per-project via
+# get_project_states(project_id). Mock it deterministically (no network) and
+# send each request with the UUID that matches its own project.
+_PROJECT_STATES = {
+    ENDURO_PLANE_ID: {
+        "in_progress": "b873d9eb-993c-48cd-97ac-99a9b1623967",
+        "approved": "a519a341-dada-4a91-8910-7604f82b79c5",
+        "rejected": "ba958f3c-5db5-461d-8f82-89425e413b97",
+    },
+    ORCH_PLANE_ID: {
+        "in_progress": "e331bfb3-e17e-4699-ba48-4abb89c21b7b",
+        "approved": "63f2c8fe-dcda-4ace-952f-dd88bd0118ff",
+        "rejected": "4c769e90-bf80-4a52-b97a-e1c84904bfc3",
+    },
+}
+
+
+def _fake_get_project_states(project_id):
+    return _PROJECT_STATES.get(project_id, _PROJECT_STATES[ENDURO_PLANE_ID])
+
+
 client = TestClient(app)
 
 
@@ -48,6 +69,10 @@ def setup(monkeypatch):
 
     monkeypatch.setattr("src.webhooks.plane.verify_plane_signature", lambda body, sig: True)
 
+    # ORCH-39: deterministic per-project Plane states, clean cache per test.
+    plane_sync.reload_project_states()
+    monkeypatch.setattr(plane_sync, "get_project_states", _fake_get_project_states)
+
     registry_json = (
         f'[{{"plane_project_id": "{ENDURO_PLANE_ID}", "repo": "enduro-trails",'
         f' "work_item_prefix": "ET", "name": "enduro-trails"}},'
@@ -60,6 +85,7 @@ def setup(monkeypatch):
     yield
 
     reload_projects()
+    plane_sync.reload_project_states()
     if os.path.exists(_test_db):
         os.unlink(_test_db)
 
@@ -103,10 +129,9 @@ def test_fetch_sequence_id_missing_field_returns_none():
 # ---------------------------------------------------------------------------
 
 # Feature 1: pipeline starts on a status change to In Progress, not on creation.
-_IN_PROGRESS = "b873d9eb-993c-48cd-97ac-99a9b1623967"
-
-
+# ORCH-39: in_progress UUID is project-specific; derive it from the project.
 def _post(plane_id, plane_project_id=ORCH_PLANE_ID, name="A valid work item title"):
+    in_progress = _fake_get_project_states(plane_project_id)["in_progress"]
     return client.post(
         "/webhook/plane",
         json={
@@ -117,7 +142,7 @@ def _post(plane_id, plane_project_id=ORCH_PLANE_ID, name="A valid work item titl
                 "name": name,
                 "description_stripped": "This is a sufficiently long description.",
                 "project": plane_project_id,
-                "state": {"id": _IN_PROGRESS, "name": "In Progress", "group": "started"},
+                "state": {"id": in_progress, "name": "In Progress", "group": "started"},
             },
         },
     )