Add Scaleway, Yousign, Railway and Crisp access-review connectors

Four API-key, single-tenant (Pattern 3) connectors:

- Scaleway: secret key in the X-Auth-Token header plus an Organization ID
  setting; GET /iam/v1alpha1/users (owner/member, status, two-factor),
  per-connection BuildProbeURL.
- Yousign: Bearer API key; GET /v3/users (admin/owner/member, is_active);
  production host with a static probe.
- Railway: Bearer account token; GraphQL me{workspaces{members}} aggregated
  and deduplicated across workspaces; custom probe, since Railway returns
  HTTP 200 with an errors body on a rejected token.
- Crisp: plugin token as HTTP Basic (identifier:key) plus a Website ID
  setting and the X-Crisp-Tier header; GET /v1/website/{id}/operators/list,
  custom probe and name resolver.

Scaleway and Crisp carry a required extra setting, so the console add-source
dialog maps organizationId/websiteId onto their scalewayOrganizationId and
crispWebsiteId API-key inputs; without that mapping the value is silently
dropped and the create is rejected.

Cassette-backed driver tests plus unit tests for the cross-workspace
deduplication, the probe contracts and the role/MFA helpers.

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

pkg/accessreview/drivers/yousign_test.go

@@ -0,0 +1,72 @@
+// Copyright (c) 2026 Probo Inc <hello@probo.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"
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"go.probo.inc/probo/pkg/coredata"
+)
+
+func TestYousignDriver(t *testing.T) {
+	t.Parallel()
+
+	rec := newRecorder(t, "testdata/yousign", "YOUSIGN_API_KEY")
+	client := newVCRClient(rec, bearerAuth(os.Getenv("YOUSIGN_API_KEY")))
+
+	driver := NewYousignDriver(client)
+	records, err := driver.ListAccounts(context.Background())
+	require.NoError(t, err)
+	require.Len(t, records, 2)
+
+	admin := records[0]
+	assert.Equal(t, "9a93d3b5-fb3b-4abf-9e70-26315b33506c", admin.ExternalID)
+	assert.Equal(t, "john.doe@example.com", admin.Email)
+	assert.Equal(t, "John Doe", admin.FullName)
+	assert.Equal(t, []string{"Admin"}, admin.Roles)
+	assert.True(t, admin.IsAdmin)
+	require.NotNil(t, admin.Active)
+	assert.True(t, *admin.Active)
+	assert.Equal(t, "Legal Counsel", admin.JobTitle)
+	assert.Equal(t, coredata.MFAStatusUnknown, admin.MFAStatus)
+	assert.NotNil(t, admin.CreatedAt)
+	assert.Equal(t, coredata.AccessReviewEntryAccountTypeUser, admin.AccountType)
+
+	// An invited (is_active=false) member is inactive regardless of onboarding
+	// status.
+	member := records[1]
+	assert.Equal(t, "b2f4e1c8-6d3a-4e2b-8f1a-9d5c7e8a0b3f", member.ExternalID)
+	assert.Equal(t, []string{"Member"}, member.Roles)
+	assert.False(t, member.IsAdmin)
+	require.NotNil(t, member.Active)
+	assert.False(t, *member.Active)
+	assert.Equal(t, "Sales Manager", member.JobTitle)
+}
+
+func TestYousignIsAdmin(t *testing.T) {
+	t.Parallel()
+
+	// owner is strictly more privileged than admin, so both are admins; the
+	// match is exact and case-insensitive, never a substring.
+	assert.True(t, yousignIsAdmin("admin"))
+	assert.True(t, yousignIsAdmin("owner"))
+	assert.True(t, yousignIsAdmin("Admin"))
+	assert.False(t, yousignIsAdmin("member"))
+	assert.False(t, yousignIsAdmin(""))
+}