chore: retrigger isolated CI builds for 6 more services on bad digests

Same congestion pattern from the crates/contracts push. gateway still had
2 healthy replicas serving traffic throughout, so no outage — just a
failed rolling-update replica for these 6 services.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/cron/src/main.rs

@@ -1,3 +1,4 @@
+// retrigger-build-marker-2
 #![allow(dead_code)]
 
 use std::env;

apps/fitness_trainers/src/main.rs

@@ -1,3 +1,4 @@
+// retrigger-build-marker-2
 #![allow(dead_code)]
 
 mod handlers;

apps/gateway/src/main.rs

@@ -1,3 +1,4 @@
+// retrigger-build-marker-2
 #![allow(dead_code)]
 
 // Gateway service - routes requests to upstream services

apps/jobs/src/main.rs

@@ -1,3 +1,4 @@
+// retrigger-build-marker-2
 #![allow(dead_code)]
 
 use axum::{

apps/tutors/src/main.rs

@@ -1,3 +1,4 @@
+// retrigger-build-marker-2
 // retrigger-build-marker
 #![allow(dead_code)]
 

apps/ugc_content_creators/src/main.rs

@@ -1,3 +1,4 @@
+// retrigger-build-marker-2
 // retrigger-build-marker
 #![allow(dead_code)]