feat: media_analytics — ETL PC+VPS → ClickHouse + Grafana

2 ETLs cada 5min suben snapshots (Jellyfin, *arr, Prowlarr, gnula,
popelis users/mylist/events) a ClickHouse en el VPS, visualizado en
Grafana (grafana.datardos.com). Ingesta PC via tunel SSH; popelis
via ETL local en el VPS. Usa clickhouse_insert_rows_py_infra.

deploy/grafana/provisioning/dashboards/dashboards.yml

@@ -0,0 +1,13 @@
+apiVersion: 1
+
+providers:
+  - name: media-stack
+    orgId: 1
+    folder: Media Stack
+    type: file
+    disableDeletion: false
+    updateIntervalSeconds: 30
+    allowUiUpdates: true
+    options:
+      path: /etc/grafana/provisioning/dashboards
+      foldersFromFilesStructure: false