feat: build vehicle data platform and production pipeline

vehicle-data-platform/apps/api/internal/platform/principal.go

@@ -0,0 +1,26 @@
+package platform
+
+import "context"
+
+type Principal struct {
+	Name string `json:"name"`
+	Role string `json:"role"`
+}
+
+type principalContextKey struct{}
+
+func WithPrincipal(ctx context.Context, principal Principal) context.Context {
+	return context.WithValue(ctx, principalContextKey{}, principal)
+}
+
+func PrincipalFromContext(ctx context.Context) (Principal, bool) {
+	principal, ok := ctx.Value(principalContextKey{}).(Principal)
+	return principal, ok
+}
+
+func ActorFromContext(ctx context.Context) string {
+	if principal, ok := PrincipalFromContext(ctx); ok && principal.Name != "" {
+		return principal.Name
+	}
+	return "system"
+}