Add Better Stack access review connector

Better Stack exposes team members and pending invitations through its
Uptime API. Wire it as an access-review connector so a Better Stack
team can be reviewed in access-review campaigns.

Better Stack has no third-party OAuth app for listing members (its
OAuth is an end-user MCP sign-in), so the connector authenticates with
a Bearer API token plus the team name that scopes the team-members
listing. The driver paginates /api/v2/team-members, maps roles and
invitation records into account records, and the source name is
resolved from the configured team.

This wires the full surface: the provider enum and migration, the
connector settings, the registry registration with the team-name extra
setting, the GraphQL input and resolver marshaling, the frontend field
mapping and connector logo, and cassette-backed driver tests.

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

pkg/coredata/connector_provider.go

@@ -39,6 +39,7 @@ const (
 	ConnectorProviderSentry       ConnectorProvider = "SENTRY"
 	ConnectorProviderSigNoz       ConnectorProvider = "SIGNOZ"
 	ConnectorProviderSupabase     ConnectorProvider = "SUPABASE"
+	ConnectorProviderBetterStack  ConnectorProvider = "BETTER_STACK"
 	ConnectorProviderGitHub       ConnectorProvider = "GITHUB"
 	ConnectorProviderIntercom     ConnectorProvider = "INTERCOM"
 	ConnectorProviderResend       ConnectorProvider = "RESEND"
@@ -87,6 +88,7 @@ func ConnectorProviders() []ConnectorProvider {
 		ConnectorProviderSentry,
 		ConnectorProviderSigNoz,
 		ConnectorProviderSupabase,
+		ConnectorProviderBetterStack,
 		ConnectorProviderGitHub,
 		ConnectorProviderIntercom,
 		ConnectorProviderResend,
@@ -131,6 +133,7 @@ func (v ConnectorProvider) IsValid() bool {
 		ConnectorProviderSentry,
 		ConnectorProviderSigNoz,
 		ConnectorProviderSupabase,
+		ConnectorProviderBetterStack,
 		ConnectorProviderGitHub,
 		ConnectorProviderIntercom,
 		ConnectorProviderResend,

pkg/coredata/connector_settings.go

@@ -136,6 +136,10 @@ type (
 	ZendeskConnectorSettings struct {
 		Subdomain string `json:"subdomain"`
 	}
+
+	BetterStackConnectorSettings struct {
+		TeamName string `json:"team_name"`
+	}
 )
 
 // GrantType returns the OAuth2 grant type recorded on the connector's

pkg/coredata/migrations/20260608T417263Z.sql

@@ -0,0 +1,15 @@
+-- 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.
+
+ALTER TYPE connector_provider ADD VALUE IF NOT EXISTS 'BETTER_STACK';