grpc microservices

• order-v1 first version

• payment-v1 first version

• grpc .proto validation for goland services

• server-sent events for payment-v1

• add circuit-breaker into order-v1

• add retry into order-v1

• testcontainers integration tests

• opentelemetry integration

• service diagram

• dockerize

• e2e tests

• unify logging

• tls encryption

• context to logging

• better implementation for grpc error wrapping

• graceful shutdown signal

• add rust service

• grpc .proto validation for rust services

• add kotlin service

• grpc .proto validation for kotlin services

• server-sent events for order-v1

• fix TODO

gRPC 101

gRPC 101