Add four API-key access-review connectors

Add Pylon, OpenRouter, incident.io and Brevo as access-review connectors.
All are API-key, single-tenant providers (Pattern 3): the key identifies
one tenant, so there is no OAuth flow, picker UI, or bootstrap/helm
configuration.

- Pylon: Bearer token, GET /users; resolves each user's opaque role_id to
  a role name via GET /user-roles, with cursor pagination.
- OpenRouter: Bearer management key, GET /api/v1/organization/members. The
  endpoint requires an organization account -- a personal key authenticates
  but returns 404 -- so the connection probe rejects 404 on top of 401/403
  (doProbeRequest gained an opt-in extra-reject set) to surface a non-org
  key at connect time instead of mid-campaign.
- incident.io: Bearer token, GET /v2/users. Its OAuth is outbound-only, so
  the API key is the inbound path; live base_role/custom_roles take
  precedence over the deprecated role enum.
- Brevo: API key in the api-key header (Registration.APIKeyHeader), GET
  /v3/organization/invited/users. A live recording corrected the documented
  schema: is_owner is a JSON boolean (not a string) and an id field is
  present, so it is used as the stable ExternalID.

The OpenRouter and Brevo cassettes are anonymized live recordings; Pylon
and incident.io use hand-authored fixtures (no self-serve test tenant). The
shared three-valued active-status mapping is consolidated into
activeFromStatus in driver.go.

Each adds the enum value, migration, GraphQL binding, provider
Registration, a driver with a cassette-driven test, and a brand logo.

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

pkg/connector/provider/probe_test.go

@@ -112,6 +112,48 @@ func TestBuildPostHogProbeURL(t *testing.T) {
 	assert.Equal(t, "https://us.posthog.com/api/organizations/@current/", probeURL)
 }
 
+func TestProbeOpenRouter(t *testing.T) {
+	t.Parallel()
+
+	// probeOpenRouter must reject 401/403 (bad key) and 404 (a valid but
+	// personal/non-organization key, which the members endpoint rejects with
+	// 404), while letting 2xx pass.
+	cases := []struct {
+		name       string
+		status     int
+		wantReject bool
+	}{
+		{"valid management key", http.StatusOK, false},
+		{"revoked key", http.StatusUnauthorized, true},
+		{"forbidden key", http.StatusForbidden, true},
+		{"personal (non-org) key", http.StatusNotFound, true},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			t.Parallel()
+
+			var gotURL string
+
+			client := &http.Client{Transport: probeRoundTripFunc(func(r *http.Request) (*http.Response, error) {
+				gotURL = r.URL.String()
+
+				return &http.Response{StatusCode: tc.status, Body: http.NoBody, Header: make(http.Header)}, nil
+			})}
+
+			err := probeOpenRouter(context.Background(), client, &coredata.Connector{Provider: coredata.ConnectorProviderOpenRouter})
+
+			assert.Equal(t, "https://openrouter.ai/api/v1/organization/members?limit=1", gotURL)
+
+			if tc.wantReject {
+				require.Error(t, err)
+			} else {
+				require.NoError(t, err)
+			}
+		})
+	}
+}
+
 func TestProbeHeroku(t *testing.T) {
 	t.Parallel()