feat(core): add defaultWorkerGroupId to AuthenticatedEnvironment

Optional per-environment default region, mapped from the Prisma row in
toAuthenticated(). Read in the trigger path to route runs.

Author: myftija

.changeset/env-default-worker-group.md

@@ -0,0 +1,5 @@
+---
+"@trigger.dev/core": patch
+---
+
+Add an optional `defaultWorkerGroupId` to the authenticated environment shape, enabling per-environment default region selection (falls back to the project, then global, default).

apps/webapp/app/models/runtimeEnvironment.server.ts

@@ -61,6 +61,7 @@ export function toAuthenticated(
     builtInEnvironmentVariableOverrides: env.builtInEnvironmentVariableOverrides,
     createdAt: env.createdAt,
     updatedAt: env.updatedAt,
+    defaultWorkerGroupId: env.defaultWorkerGroupId,
     project: {
       id: env.project.id,
       slug: env.project.slug,

packages/core/src/v3/auth/environment.ts

@@ -57,6 +57,11 @@ export type AuthenticatedEnvironment = {
   createdAt: Date;
   updatedAt: Date;
 
+  // Per-environment default region. Optional so plugins that don't set
+  // it fall back to the project/global default. Read in the trigger hot
+  // path (getWorkerQueue) to route runs.
+  defaultWorkerGroupId?: string | null;
+
   project: {
     id: string;
     slug: string;