feat: Added grpc based health check

[Sarthak1799]

Type of Change

• Bugfix
• New feature
• Enhancement
• Refactoring
• Dependency updates
• Documentation
• CI/CD

Description

Implemented gRPC based health check

Additional Changes

• This PR modifies the API contract
• This PR modifies the database schema
• This PR modifies application configuration/environment variables

Motivation and Context

How did you test it?

Tested locally

curl --location --request GET 'http://localhost:8080/health/ready' \
--header 'Content-Type: application/json' \
--header 'Accept: application/json' \
--header 'api-key: dev_Li5BLbzNIHjf2t0J6kYgS7sQurtmLubs1sGAxTE6MVo59aMBEMDSK6Qt8me7kJZQ'

Response

{
    "database": true,
    "redis": true,
    "analytics": true,
    "opensearch": true,
    "outgoing_request": true,
    "grpc_health_check": {
        "dynamic_routing_service": true
    }
}

Response when runtime config is disabled

{
    "database": true,
    "redis": true,
    "analytics": true,
    "opensearch": true,
    "outgoing_request": true,
    "grpc_health_check": {}
}

Checklist

• I formatted the code cargo +nightly fmt --all
• I addressed lints thrown by cargo clippy
• I reviewed the submitted code
• I added unit tests for my changes where possible

[semanticdiff-com]

Review changes with  

Changed Files

File	Status
crates/external_services/build.rs	51% smaller
crates/external_services/src/grpc_client.rs	1% smaller
config/config.example.toml	Unsupported file format
config/deployments/env_specific.toml	Unsupported file format
crates/api_models/Cargo.toml	Unsupported file format
crates/api_models/src/health_check.rs	0% smaller
crates/external_services/src/grpc_client/dynamic_routing.rs	0% smaller
crates/external_services/src/grpc_client/health_check_client.rs	0% smaller
crates/router/Cargo.toml	Unsupported file format
crates/router/src/core/health_check.rs	0% smaller
crates/router/src/routes/health.rs	0% smaller
crates/storage_impl/src/errors.rs	0% smaller
proto/health_check.proto	Unsupported file format