fix(monitoring): promtail depends_on service_started instead of healthy

Loki healthcheck interval is 5min — using service_healthy blocks Promtail
from starting for up to 5 minutes. service_started is sufficient since
Loki reports /ready immediately after startup.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docker-compose.macmini.yml

@@ -1626,7 +1626,7 @@ services:
       - /var/run/docker.sock:/var/run/docker.sock:ro
     depends_on:
       loki:
-        condition: service_healthy
+        condition: service_started
     healthcheck:
       test: ["CMD", "wget", "--no-verbose", "--tries=1", "--spider", "http://127.0.0.1:9080/ready"]
       interval: 300s