[core] Doppler --watch for deployed services so that any changes in config restart the services directly

[AquiGorka]

Context: we use doppler to inject env vars at runtime (eg doppler run -- binary --param value), for all of our deployed services and for all the environments (even local dev has a private key in place and some other envs so that we don't have to be sharing those around - back a few weeks we were using this mechanism with a lot more stuff but we trimmed it by adding go embeds for contract addresses, and service urls).

The doppler cli tool offers a --watch param that restarts the process it wrapped (easier to restart a service this way than having to re-deploy a service). The intention here is to add this param all around where doppler is used (stack, dockerfiles, github actin workflowss, and maybe a couple more? a full text search may be able to return all the matches for doppler).