handleAliases.map() crashes when field is string not array

https://sonarly.com/issue/22112?type=bug

Contact auto-creation crashes with TypeError because connectedAccount.handleAliases can be a plain string after migration from workspace TEXT column to core varchar[] column, but the code assumes it is always an array.

Fix: Replaced `connectedAccount.handleAliases || []` with `Array.isArray(connectedAccount.handleAliases) ? connectedAccount.handleAliases : []` at both usage sites where handleAliases is consumed as an array.

The `|| []` fallback only activates for falsy values (null, undefined, empty string), but a non-empty string like "alias1@example.com,alias2@example.com" is truthy, so it passes through and then fails on .map() or .includes() with array semantics. Array.isArray() correctly rejects strings and all non-array types, ensuring we always operate on a real array.

Two files changed:
1. filter-out-contacts-that-belong-to-self-or-workspace-members.util.ts (line 23) — the crash site from the Sentry error
2. messaging-save-messages-and-enqueue-contact-creation.service.ts (line 52) — same pattern, would cause incorrect substring matching (not a crash, but wrong behavior) if handleAliases were a string

packages/twenty-server/src/modules/contact-creation-manager/utils/filter-out-contacts-that-belong-to-self-or-workspace-members.util.ts

@@ -18,11 +18,13 @@ export function filterOutContactsThatBelongToSelfOrWorkspaceMembers(
     connectedAccount.handle,
   ).toLowerCase();
 
+  const handleAliases = Array.isArray(connectedAccount.handleAliases)
+    ? connectedAccount.handleAliases
+    : [];
+
   const allHandles = [
     connectedAccount.handle.toLowerCase(),
-    ...(connectedAccount.handleAliases || []).map((handle) =>
-      handle.toLowerCase(),
-    ),
+    ...handleAliases.map((handle) => handle.toLowerCase()),
   ];
 
   const workspaceMembersMap = workspaceMembers.reduce(

packages/twenty-server/src/modules/messaging/message-import-manager/services/messaging-save-messages-and-enqueue-contact-creation.service.ts

@@ -49,7 +49,9 @@ export class MessagingSaveMessagesAndEnqueueContactCreationService {
     connectedAccount: ConnectedAccountEntity,
     workspaceId: string,
   ) {
-    const handleAliases = connectedAccount.handleAliases || [];
+    const handleAliases = Array.isArray(connectedAccount.handleAliases)
+      ? connectedAccount.handleAliases
+      : [];
     const authContext = buildSystemAuthContext(workspaceId);
 
     const participantsWithMessageId =