Add project-level environment variables

Co-Authored-By: Paperclip <noreply@paperclip.ing>

packages/shared/src/validators/project.ts

@@ -1,5 +1,6 @@
 import { z } from "zod";
 import { PROJECT_STATUSES } from "../constants.js";
+import { envConfigSchema } from "./secret.js";
 
 const executionWorkspaceStrategySchema = z
   .object({
@@ -102,6 +103,7 @@ const projectFields = {
   leadAgentId: z.string().uuid().optional().nullable(),
   targetDate: z.string().optional().nullable(),
   color: z.string().optional().nullable(),
+  env: envConfigSchema.optional().nullable(),
   executionWorkspacePolicy: projectExecutionWorkspacePolicySchema.optional().nullable(),
   archivedAt: z.string().datetime().optional().nullable(),
 };