feat(tests,users): blocking procedure-suggestion review on test detail, multi-role switcher, Power Automate webhook payload

- A lead opening a test with a pending procedure suggestion awaiting
  their review now gets a blocking popup (approve/reject only) instead
  of discovering it later in a separate queue.
- Users can be granted more than one role via extra_roles; only one is
  ever active at a time (no permission mixing) and a top-bar switcher
  lets the user swap which one, taking effect immediately since role
  is read fresh from the DB on every request.
- The password-setup/reset webhook now posts the agreed Power Automate
  contract ({to, subject, body} with the platform's standard greeting
  and signature template) and supports an admin-configured API key
  sent as an x-api-key header.

backend/tests/test_multi_role_switch.py

@@ -0,0 +1,96 @@
+"""A user can be granted more than one role but only ever acts under a
+single active one at a time — switching swaps which role is active
+instead of ever mixing permissions from more than one.
+"""
+
+
+def test_admin_can_grant_extra_roles(api, auth_headers):
+    created = api(
+        "post", "/api/v1/users", auth_headers,
+        json={"full_name": "Multi Role User", "email": "multirole@test.com", "role": "red_tech"},
+    )
+    assert created.status_code == 201, created.text
+    user_id = created.json()["id"]
+
+    resp = api(
+        "patch", f"/api/v1/users/{user_id}", auth_headers,
+        json={"extra_roles": ["blue_tech", "red_lead"]},
+    )
+    assert resp.status_code == 200, resp.text
+    assert resp.json()["role"] == "red_tech"
+    assert set(resp.json()["extra_roles"]) == {"blue_tech", "red_lead"}
+
+
+def test_admin_cannot_grant_invalid_extra_role(api, auth_headers):
+    created = api(
+        "post", "/api/v1/users", auth_headers,
+        json={"full_name": "Bad Extra Role", "email": "badextrarole@test.com", "role": "viewer"},
+    )
+    user_id = created.json()["id"]
+
+    resp = api(
+        "patch", f"/api/v1/users/{user_id}", auth_headers,
+        json={"extra_roles": ["superuser"]},
+    )
+    assert resp.status_code == 400
+
+
+def test_user_can_switch_to_a_granted_extra_role(api, db, auth_headers):
+    from app.auth import hash_password
+    from app.models.user import User
+
+    user = User(
+        username="switcher@test.com",
+        email="switcher@test.com",
+        full_name="Switcher",
+        hashed_password=hash_password("SwitcherPass123!@#"),
+        role="red_tech",
+        extra_roles=["blue_tech"],
+        must_change_password=False,
+    )
+    db.add(user)
+    db.commit()
+
+    login = api(
+        "post", "/api/v1/auth/login", {},
+        data={"username": "switcher@test.com", "password": "SwitcherPass123!@#"},
+    )
+    assert login.status_code == 200, login.text
+    token = login.json()["access_token"]
+    headers = {"Authorization": f"Bearer {token}"}
+
+    resp = api("post", "/api/v1/users/me/switch-role", headers, json={"role": "blue_tech"})
+    assert resp.status_code == 200, resp.text
+    body = resp.json()
+    assert body["role"] == "blue_tech"
+    assert body["extra_roles"] == ["red_tech"]
+
+    me = api("get", "/api/v1/auth/me", headers)
+    assert me.json()["role"] == "blue_tech"
+
+
+def test_user_cannot_switch_to_an_ungranted_role(api, db, auth_headers):
+    from app.auth import hash_password
+    from app.models.user import User
+
+    user = User(
+        username="switcher2@test.com",
+        email="switcher2@test.com",
+        full_name="Switcher Two",
+        hashed_password=hash_password("SwitcherPass123!@#"),
+        role="red_tech",
+        extra_roles=["blue_tech"],
+        must_change_password=False,
+    )
+    db.add(user)
+    db.commit()
+
+    login = api(
+        "post", "/api/v1/auth/login", {},
+        data={"username": "switcher2@test.com", "password": "SwitcherPass123!@#"},
+    )
+    token = login.json()["access_token"]
+    headers = {"Authorization": f"Bearer {token}"}
+
+    resp = api("post", "/api/v1/users/me/switch-role", headers, json={"role": "admin"})
+    assert resp.status_code == 400