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/accessreview/drivers/openrouter.go

@@ -0,0 +1,171 @@
+// 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"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"strconv"
+	"strings"
+
+	"go.probo.inc/probo/pkg/coredata"
+)
+
+const (
+	openRouterMembersEndpoint = "https://openrouter.ai/api/v1/organization/members"
+	// openRouterPageSize is the maximum page size GET /organization/members
+	// accepts (limit must be between 1 and 100).
+	openRouterPageSize = 100
+)
+
+// OpenRouterDriver lists the members of a single OpenRouter organization. The
+// management (provisioning) API key is bound to one organization, so GET
+// /api/v1/organization/members returns every member of that organization
+// with no tenant selector.
+type OpenRouterDriver struct {
+	httpClient *http.Client
+}
+
+var _ Driver = (*OpenRouterDriver)(nil)
+
+type openRouterMember struct {
+	ID        string  `json:"id"`
+	Email     string  `json:"email"`
+	FirstName *string `json:"first_name"`
+	LastName  *string `json:"last_name"`
+	// Role is OpenRouter's organization role enum: "org:admin" or
+	// "org:member".
+	Role string `json:"role"`
+}
+
+type openRouterMembersResponse struct {
+	Data       []openRouterMember `json:"data"`
+	TotalCount int                `json:"total_count"`
+}
+
+func NewOpenRouterDriver(httpClient *http.Client) *OpenRouterDriver {
+	return &OpenRouterDriver{httpClient: httpClient}
+}
+
+func (d *OpenRouterDriver) ListAccounts(ctx context.Context) ([]AccountRecord, error) {
+	var records []AccountRecord
+
+	offset := 0
+
+	for range maxPaginationPages {
+		resp, err := d.fetchMembersPage(ctx, offset)
+		if err != nil {
+			return nil, err
+		}
+
+		for _, m := range resp.Data {
+			email := strings.TrimSpace(m.Email)
+			if email == "" {
+				continue
+			}
+
+			records = append(records, AccountRecord{
+				Email:       email,
+				FullName:    openRouterFullName(m, email),
+				Roles:       openRouterRoles(m.Role),
+				IsAdmin:     m.Role == "org:admin",
+				MFAStatus:   coredata.MFAStatusUnknown,
+				AuthMethod:  coredata.AccessReviewEntryAuthMethodUnknown,
+				AccountType: coredata.AccessReviewEntryAccountTypeUser,
+				ExternalID:  strings.TrimSpace(m.ID),
+			})
+		}
+
+		offset += len(resp.Data)
+		if len(resp.Data) < openRouterPageSize || offset >= resp.TotalCount {
+			return records, nil
+		}
+	}
+
+	return nil, fmt.Errorf("cannot list all openrouter members: %w", ErrPaginationLimitReached)
+}
+
+func (d *OpenRouterDriver) fetchMembersPage(ctx context.Context, offset int) (*openRouterMembersResponse, error) {
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, openRouterMembersEndpoint, nil)
+	if err != nil {
+		return nil, fmt.Errorf("cannot create openrouter members request: %w", err)
+	}
+
+	q := req.URL.Query()
+	q.Set("limit", strconv.Itoa(openRouterPageSize))
+	q.Set("offset", strconv.Itoa(offset))
+	req.URL.RawQuery = q.Encode()
+
+	req.Header.Set("Accept", "application/json")
+
+	httpResp, err := d.httpClient.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("cannot execute openrouter members request: %w", err)
+	}
+
+	defer func() {
+		_ = httpResp.Body.Close()
+	}()
+
+	if httpResp.StatusCode < 200 || httpResp.StatusCode >= 300 {
+		return nil, fmt.Errorf("cannot fetch openrouter members: unexpected status %d", httpResp.StatusCode)
+	}
+
+	var resp openRouterMembersResponse
+	if err := json.NewDecoder(httpResp.Body).Decode(&resp); err != nil {
+		return nil, fmt.Errorf("cannot decode openrouter members response: %w", err)
+	}
+
+	return &resp, nil
+}
+
+func openRouterFullName(m openRouterMember, fallback string) string {
+	first := ""
+	if m.FirstName != nil {
+		first = strings.TrimSpace(*m.FirstName)
+	}
+
+	last := ""
+	if m.LastName != nil {
+		last = strings.TrimSpace(*m.LastName)
+	}
+
+	full := strings.TrimSpace(first + " " + last)
+	if full != "" {
+		return full
+	}
+
+	return fallback
+}
+
+// openRouterRoles maps OpenRouter's organization role enum
+// (org:admin / org:member) to a display label, preserving any unknown
+// future role verbatim.
+func openRouterRoles(role string) []string {
+	switch role {
+	case "org:admin":
+		return []string{"Admin"}
+	case "org:member":
+		return []string{"Member"}
+	default:
+		if strings.TrimSpace(role) != "" {
+			return []string{role}
+		}
+
+		return []string{}
+	}
+}