Add production-grade Go gRPC scaffold service

MODULE.bazel

@@ -5,10 +5,10 @@ module(
 )
 
 # Go rules for building Go code
-bazel_dep(name = "rules_go", version = "0.56.1")
+bazel_dep(name = "rules_go", version = "0.60.0")
 
 # Gazelle for generating BUILD files automatically
-bazel_dep(name = "gazelle", version = "0.44.0")
+bazel_dep(name = "gazelle", version = "0.50.0")
 
 # Rust rules for building Rust code
 bazel_dep(name = "rules_rust", version = "0.67.0")
@@ -22,7 +22,7 @@ bazel_dep(name = "protobuf", version = "29.0")
 
 # Configure Go SDK
 go_sdk = use_extension("@rules_go//go:extensions.bzl", "go_sdk")
-go_sdk.download(version = "1.24.6")
+go_sdk.download(version = "1.24.13")
 
 # Configure Go dependencies from go.work
 go_deps = use_extension("@gazelle//:extensions.bzl", "go_deps")
@@ -34,7 +34,24 @@ go_deps.config(
         "GOPROXY": "https://proxy.golang.org,direct",
     },
 )
-use_repo(go_deps, "org_golang_google_grpc")
+use_repo(
+    go_deps,
+    "com_github_google_uuid",
+    "com_github_grpc_ecosystem_go_grpc_middleware_v2",
+    "com_github_jackc_pgx_v5",
+    "com_github_open_feature_go_sdk",
+    "com_github_prometheus_client_golang",
+    "io_opentelemetry_go_contrib_instrumentation_google_golang_org_grpc_otelgrpc",
+    "io_opentelemetry_go_otel",
+    "io_opentelemetry_go_otel_exporters_prometheus",
+    "io_opentelemetry_go_otel_sdk",
+    "io_opentelemetry_go_otel_sdk_metric",
+    "io_opentelemetry_go_otel_trace",
+    "org_golang_google_genproto_googleapis_rpc",
+    "org_golang_google_grpc",
+    "org_golang_google_protobuf",
+    "org_golang_x_time",
+)
 
 # Configure Rust toolchain
 rust = use_extension("@rules_rust//rust:extensions.bzl", "rust")

README.md

@@ -11,6 +11,15 @@
 
 ## What's Included
 
+- **scaffold/**: Production-grade Go gRPC service reference implementation
+  - Structured logging (slog + JSON), request ID propagation
+  - OpenTelemetry metrics + traces with Prometheus exposition
+  - gRPC health checking, reflection, and channelz debugging
+  - Rate limiting, auth interceptor, structured error handling (google.rpc.Status)
+  - Feature flags via OpenFeature SDK
+  - PostgreSQL database access (pgx + sqlc), optional at runtime
+  - Build metadata injection via Bazel x_defs
+  - Kubernetes deployment manifests (health probes, HPA, graceful shutdown)
 - **grpc_example/**: Working gRPC service implementations
   - Go client and server
   - Rust client and server
@@ -19,6 +28,7 @@
 
 ## Use Cases
 
+- Building production-ready Go microservices on Kubernetes
 - Starting a polyglot microservices project
 - Learning how to structure multi-language Bazel workspaces
 - Understanding gRPC service implementations across different languages

WORKSPACE

@@ -1,3 +1,7 @@
 # Empty WORKSPACE file for IDE compatibility
 # Using Bzlmod (MODULE.bazel) for dependency management
 
+load("//:deps.bzl", "go_dependencies")
+
+# gazelle:repository_macro deps.bzl%go_dependencies
+go_dependencies()