fix(07-01): allow providers to edit published job offers

Added edit_published_job_offers capability to ddhh_provider role and created upgrade_roles function to automatically add this capability to existing provider accounts. Providers can now edit their published job offers from the dashboard.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

includes/class-ddhh-job-manager.php

@@ -50,6 +50,9 @@ class DDHH_JM_Job_Manager {
 		// Initialize post types
 		add_action( 'init', array( 'DDHH_JM_Post_Types', 'register' ) );
 
+		// Upgrade roles with any new capabilities
+		add_action( 'init', array( 'DDHH_JM_Roles', 'upgrade_roles' ) );
+
 		// Initialize ACF fields
 		add_action( 'acf/init', array( 'DDHH_JM_ACF_Fields', 'register_fields' ) );