relabel drop removed the entire stream before labels were set, causing
the "at least one label pair required" error. pipeline_stages drop runs
after labels are established, which is correct for filtering by tier.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Containers that don't match any tier regex had no labels, causing Loki to
reject the stream with "at least one label pair is required".
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Loki was already running but had no log shipper. Adds Promtail to collect
Docker logs from all 66 containers with automatic tier labeling (infra,
auth, core, app, matrix, games) and a Grafana Logs Explorer dashboard.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>