Rename access-review migration with random time → Validate PagerDuty subdomain on OAuth callback

- Rename access-review migration with random time
- Move PagerDuty token-response handling to its own file
- Strip OAuth error_description from log and redirect
- Validate PagerDuty subdomain on OAuth callback

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

pkg/connector/pagerduty.go

@@ -0,0 +1,42 @@
+// 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 connector
+
+import "encoding/json"
+
+const (
+	PagerDutyProvider = "PAGERDUTY"
+)
+
+// AbsorbPagerDutyTokenResponse extracts the customer subdomain that
+// PagerDuty's Scoped OAuth surfaces in the token-exchange response body
+// and stuffs it into state.ProviderMetadata. The OAuth callback handler
+// later writes that value to PagerDutyConnectorSettings. No-op when the
+// state's provider is not PagerDuty or when the body has no subdomain.
+func AbsorbPagerDutyTokenResponse(state *OAuth2State, body []byte) {
+	if state == nil || state.Provider != PagerDutyProvider {
+		return
+	}
+	var pd struct {
+		Subdomain string `json:"subdomain"`
+	}
+	if err := json.Unmarshal(body, &pd); err != nil || pd.Subdomain == "" {
+		return
+	}
+	if state.ProviderMetadata == nil {
+		state.ProviderMetadata = map[string]string{}
+	}
+	state.ProviderMetadata["subdomain"] = pd.Subdomain
+}