Add Notion workspace name resolver

Notion was the only wired access-review connector without a name
resolver, so the source kept the generic "Notion" placeholder. Fetch
the workspace name from /v1/users/me (bot.workspace_name) following
the same pattern as the other resolvers, and refresh the stale scope
comment now that Notion participates in name resolution.

Signed-off-by: Aurélien Sibiril <81782+aureliensibiril@users.noreply.github.com>

pkg/accessreview/drivers/name_resolver_test.go

@@ -0,0 +1,100 @@
+// Copyright (c) 2026 Probo Inc <hello@getprobo.com>.
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+package drivers
+
+import (
+	"context"
+	"net/http"
+	"net/http/httptest"
+	"net/url"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+// hostRewriter redirects requests to the configured target host so that
+// resolvers with hardcoded production URLs (api.notion.com, etc.) can be
+// pointed at an httptest server.
+type hostRewriter struct {
+	target string
+}
+
+func (h *hostRewriter) RoundTrip(r *http.Request) (*http.Response, error) {
+	u, err := url.Parse(h.target)
+	if err != nil {
+		return nil, err
+	}
+	r2 := r.Clone(r.Context())
+	r2.URL.Scheme = u.Scheme
+	r2.URL.Host = u.Host
+	return http.DefaultTransport.RoundTrip(r2)
+}
+
+func TestNotionNameResolver(t *testing.T) {
+	t.Parallel()
+
+	cases := []struct {
+		name    string
+		status  int
+		body    string
+		want    string
+		wantErr bool
+	}{
+		{
+			name:   "bot with workspace_name",
+			status: http.StatusOK,
+			body:   `{"type":"bot","bot":{"workspace_name":"Acme Inc"}}`,
+			want:   "Acme Inc",
+		},
+		{
+			name:   "user token (no bot field)",
+			status: http.StatusOK,
+			body:   `{"type":"person"}`,
+			want:   "",
+		},
+		{
+			name:    "server error",
+			status:  http.StatusInternalServerError,
+			body:    `{"message":"boom"}`,
+			wantErr: true,
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			t.Parallel()
+
+			srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+				assert.Equal(t, http.MethodGet, r.Method)
+				assert.Equal(t, "/v1/users/me", r.URL.Path)
+				assert.Equal(t, notionAPIVersion, r.Header.Get("Notion-Version"))
+				w.Header().Set("Content-Type", "application/json")
+				w.WriteHeader(tc.status)
+				_, _ = w.Write([]byte(tc.body))
+			}))
+			defer srv.Close()
+
+			client := &http.Client{Transport: &hostRewriter{target: srv.URL}}
+			got, err := NewNotionNameResolver(client).ResolveInstanceName(context.Background())
+			if tc.wantErr {
+				require.Error(t, err)
+				return
+			}
+			require.NoError(t, err)
+			assert.Equal(t, tc.want, got)
+		})
+	}
+}