Fix flaky deploy health check: poll instead of fixed 2s sleep

The service can take longer than 2s to finish starting after
restart (DB pool init, etc), so systemctl is-active would
occasionally still report "activating" at the fixed check point --
CI marked the run failed even though the app came up moments later
and was actually fine. Poll for up to 15s instead, and dump service
status on a real failure so debugging doesn't require SSH access.

.gitea/workflows/deploy.yml

@@ -62,5 +62,14 @@ jobs:
             sudo systemctl restart bflr
 
             echo "==> Waiting for startup..."
-            sleep 2
+            for i in $(seq 1 15); do
-            systemctl is-active --quiet bflr && echo "Deploy successful!" || (echo "Service failed to start!" && exit 1)
+              if systemctl is-active --quiet bflr; then
+                echo "Deploy successful!"
+                exit 0
+              fi
+              sleep 1
+            done
+
+            echo "Service failed to start!"
+            sudo systemctl status bflr --no-pager -l || true
+            exit 1