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/datasources/clickhouse.yml

@@ -0,0 +1,16 @@
+apiVersion: 1
+
+datasources:
+  - name: ClickHouse
+    uid: clickhouse
+    type: grafana-clickhouse-datasource
+    access: proxy
+    isDefault: true
+    jsonData:
+      host: clickhouse
+      port: 9000
+      protocol: native
+      username: analytics
+      defaultDatabase: analytics
+    secureJsonData:
+      password: ${CH_PASSWORD}