Add gRPC health check

[aoudiamoncef]

• document all added functions
• try in sandbox /simulation/labnet
• unit tests on the added/changed features
  • make tests compile
  • make tests pass
• add logs allowing easy debugging in case the changes caused problems
• if the API has changed, update the API specification

🤖 Generated by Copilot at cbdc4c4

Summary

🩺🛠️📄

This pull request adds a gRPC health service to the MassaService and allows users to enable or disable it via the config file. It also fixes a bug in the ScExecutionEventContext message definition in the massa-proto crate.

We are the Massa, we serve the gRPC
We check our health with enable_health
We fix our bugs and we load our config
We rock the network with MassaService

Walkthrough

• Add a new field enable_health to the GrpcConfig struct and the GrpcSettings struct to allow users to configure the gRPC health service via the config file (link, link)
• Pass the enable_health value from the config file to the gRPC server initialization in the main function (link)
• Create and add an optional HealthService to the gRPC server based on the enable_health flag in the start function of massa-grpc/src/server.rs (link, link, link)
• Define and spawn a task to periodically update the health status of the MassaService using a HealthReporter and a stub function massa_service_status in massa-grpc/src/server.rs (link, link)
• Fix a bug in the tag numbers of the ScExecutionEventContext message definition in massa-proto/src/massa.api.v1.rs (link)

[AurelienFT]

I'm ok to merge this for 22