[Alloy] Redirect all SSH-reachable Alloy log outputs to VictoriaLogs

[letwir]

Depends on VictoriaLogs ingestion verification.

Tasks:

• Enumerate host aliases from ~/.ssh/config without exposing credentials.
• Back up every Alloy configuration.
• Change Loki log output to http://db.tigris-tailor.ts.net:9428/insert/loki/api/v1/push.
• Validate configuration and restart Alloy host by host.
• Confirm VictoriaLogs receives logs from every host.