fix: add collector role to API endpoints for mobile dashboard access

Collector users were blocked from ticket, payment, invoice, and client
endpoints requiring 'technician' role. Added 'collector' to @Roles
decorators and the COLLECTOR role to the shared role hierarchy.

packages/shared/src/constants/roles.ts

@@ -3,6 +3,7 @@ export const Role = {
   TENANT_ADMIN: 'tenant_admin',
   MANAGER: 'manager',
   TECHNICIAN: 'technician',
+  COLLECTOR: 'collector',
   VIEWER: 'viewer',
 } as const;
 
@@ -20,6 +21,7 @@ const ROLE_LEVEL: Record<string, number> = {
   [Role.TENANT_ADMIN]: 80,
   [Role.MANAGER]: 60,
   [Role.TECHNICIAN]: 40,
+  [Role.COLLECTOR]: 30,
   [Role.VIEWER]: 20,
 };