Add SigNoz access review driver

Add a SigNoz connector so its organization members can be pulled into
access-review campaign snapshots. SigNoz authenticates with a
SIGNOZ-API-KEY admin service-account key and a customer-supplied base
URL (a SigNoz Cloud region/tenant host or a self-hosted instance).

The driver lists users via GET /api/v1/user, which returns the role
(ADMIN/EDITOR/VIEWER) inline so admin detection works in a single call,
and maps the SigNoz user status (active / pending_invite / deleted) to
the account active flag. The name resolver reads the organization
display name from GET /api/v2/orgs/me to title the access source.

Wire the provider through the coredata enum and settings, the
connector-provider registry (driver and name-resolver factories), the
console API-key input schema and validation, the access-review source
label, and the SigNoz brand logo.

Co-authored-by: Bryan FRIMIN <bryan@frimin.fr>
Signed-off-by: Aurélien Sibiril <81782+aureliensibiril@users.noreply.github.com>

pkg/connector/provider/signoz_test.go

@@ -0,0 +1,130 @@
+// 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 provider_test
+
+import (
+	"context"
+	"encoding/json"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"go.gearno.de/kit/httpclient"
+	"go.probo.inc/probo/pkg/accessreview/drivers"
+	"go.probo.inc/probo/pkg/connector/provider"
+	"go.probo.inc/probo/pkg/coredata"
+)
+
+func TestSigNozRegistrationMetadata(t *testing.T) {
+	t.Parallel()
+
+	r := provider.NewBuiltinRegistry()
+	reg, ok := r.Get(coredata.ConnectorProviderSigNoz)
+	require.True(t, ok, "signoz provider must be registered")
+
+	assert.Equal(t, "SigNoz", reg.DisplayName)
+	assert.True(t, reg.SupportsAPIKey)
+	assert.Equal(t, "SIGNOZ-API-KEY", reg.APIKeyHeader)
+	require.Len(t, reg.ExtraSettings, 1)
+	assert.Equal(t, "baseUrl", reg.ExtraSettings[0].Key)
+	assert.Equal(t, "Base URL", reg.ExtraSettings[0].Label)
+	assert.True(t, reg.ExtraSettings[0].Required)
+	require.NotNil(t, reg.NewNameResolver, "signoz NewNameResolver closure must be wired")
+}
+
+func TestSigNozNewNameResolver(t *testing.T) {
+	t.Parallel()
+
+	r := provider.NewBuiltinRegistry()
+	reg, ok := r.Get(coredata.ConnectorProviderSigNoz)
+	require.True(t, ok, "signoz provider must be registered")
+	require.NotNil(t, reg.NewNameResolver, "signoz NewNameResolver closure must be wired")
+
+	raw, err := json.Marshal(&coredata.SigNozConnectorSettings{
+		BaseURL: "https://acme.us.signoz.cloud",
+	})
+	require.NoError(t, err)
+
+	conn := &coredata.Connector{
+		Provider:    coredata.ConnectorProviderSigNoz,
+		RawSettings: raw,
+	}
+
+	resolver := reg.NewNameResolver(
+		context.Background(),
+		httpclient.DefaultClient(httpclient.WithSSRFProtection()),
+		conn,
+		nil,
+	)
+	require.NotNil(t, resolver)
+}
+
+func TestSigNozNewDriver(t *testing.T) {
+	t.Parallel()
+
+	r := provider.NewBuiltinRegistry()
+	reg, ok := r.Get(coredata.ConnectorProviderSigNoz)
+	require.True(t, ok, "signoz provider must be registered")
+	require.NotNil(t, reg.NewDriver, "signoz NewDriver closure must be wired")
+
+	t.Run("creates driver with valid base_url", func(t *testing.T) {
+		t.Parallel()
+
+		raw, err := json.Marshal(&coredata.SigNozConnectorSettings{
+			BaseURL: "https://cloud.signoz.io",
+		})
+		require.NoError(t, err)
+
+		conn := &coredata.Connector{
+			Provider:    coredata.ConnectorProviderSigNoz,
+			RawSettings: raw,
+		}
+
+		drv, err := reg.NewDriver(context.Background(), httpclient.DefaultClient(httpclient.WithSSRFProtection()), conn, nil)
+		require.NoError(t, err)
+		assert.IsType(t, &drivers.SigNozDriver{}, drv)
+	})
+
+	t.Run("errors when base_url is missing", func(t *testing.T) {
+		t.Parallel()
+
+		conn := &coredata.Connector{
+			Provider:    coredata.ConnectorProviderSigNoz,
+			RawSettings: []byte(`{}`),
+		}
+
+		_, err := reg.NewDriver(context.Background(), httpclient.DefaultClient(httpclient.WithSSRFProtection()), conn, nil)
+		require.Error(t, err)
+		assert.Contains(t, err.Error(), "base_url is required")
+	})
+
+	t.Run("errors when base_url is invalid", func(t *testing.T) {
+		t.Parallel()
+
+		raw, err := json.Marshal(&coredata.SigNozConnectorSettings{
+			BaseURL: "ftp://cloud.signoz.io",
+		})
+		require.NoError(t, err)
+
+		conn := &coredata.Connector{
+			Provider:    coredata.ConnectorProviderSigNoz,
+			RawSettings: raw,
+		}
+
+		_, err = reg.NewDriver(context.Background(), httpclient.DefaultClient(httpclient.WithSSRFProtection()), conn, nil)
+		require.Error(t, err)
+		assert.Contains(t, err.Error(), "base_url must be an http(s) URL")
+	})
+}