Correctly indicate unstable elements

- Match the requirements defined in open-telemetry#597
- Use v1development instead of v1 to match what we do for profiles: https://github.com/open-telemetry/opentelemetry-proto/tree/main/opentelemetry/proto/profiles/v1development

opentelemetry/proto/collector/entities/v1/entities_service.proto → opentelemetry/proto/collector/entities/v1development/entities_service.proto

@@ -14,15 +14,15 @@
 
 syntax = "proto3";
 
-package opentelemetry.proto.collector.entities.v1;
+package opentelemetry.proto.collector.entities.v1development;
 
-import "opentelemetry/proto/entities/v1/entities.proto";
+import "opentelemetry/proto/entities/v1development/entities.proto";
 
-option csharp_namespace = "OpenTelemetry.Proto.Collector.Entities.V1";
+option csharp_namespace = "OpenTelemetry.Proto.Collector.Entities.V1Development";
 option java_multiple_files = true;
-option java_package = "io.opentelemetry.proto.collector.entities.v1";
+option java_package = "io.opentelemetry.proto.collector.entities.v1development";
 option java_outer_classname = "EntitiesServiceProto";
-option go_package = "go.opentelemetry.io/proto/otlp/collector/entities/v1";
+option go_package = "go.opentelemetry.io/proto/otlp/collector/entities/v1development";
 
 // Service that can be used to push entities between one Application instrumented with
 // OpenTelemetry and a collector, or between a collector and a central collector (in this
@@ -35,7 +35,7 @@ service EntitiesService {
 
 message ExportEntitiesServiceRequest {
   // An array of ResourceEntities.
-  repeated opentelemetry.proto.entities.v1.ScopeEntities scope_entities = 1;
+  repeated opentelemetry.proto.entities.v1development.ScopeEntities scope_entities = 1;
 }
 
 message ExportEntitiesServiceResponse {

opentelemetry/proto/collector/entities/v1/entities_service_http.yaml → opentelemetry/proto/collector/entities/v1development/entities_service_http.yaml

@@ -4,6 +4,6 @@ type: google.api.Service
 config_version: 3
 http:
  rules:
- - selector: opentelemetry.proto.collector.entities.v1.EntitiesService.Export
-   post: /v1/entities
+ - selector: opentelemetry.proto.collector.entities.v1development.EntitiesService.Export
+   post: /v1development/entities
    body: "*"

opentelemetry/proto/entities/v1/entities.proto → opentelemetry/proto/entities/v1development/entities.proto

@@ -14,16 +14,16 @@
 
 syntax = "proto3";
 
-package opentelemetry.proto.entities.v1;
+package opentelemetry.proto.entities.v1development;
 
 import "opentelemetry/proto/common/v1/common.proto";
 import "opentelemetry/proto/resource/v1/resource.proto";
 
-option csharp_namespace = "OpenTelemetry.Proto.Entities.V1";
+option csharp_namespace = "OpenTelemetry.Proto.Entities.V1Development";
 option java_multiple_files = true;
-option java_package = "io.opentelemetry.proto.entities.v1";
+option java_package = "io.opentelemetry.proto.entities.v1development";
 option java_outer_classname = "EntitiesProto";
-option go_package = "go.opentelemetry.io/proto/otlp/entities/v1";
+option go_package = "go.opentelemetry.io/proto/otlp/entities/v1development";
 
 // EntitiesData represents the entities data that can be stored in persistent storage,
 // OR can be embedded by other protocols that transfer OTLP entities data but do not

opentelemetry/proto/resource/v1/resource.proto

@@ -36,9 +36,11 @@ message Resource {
   uint32 dropped_attributes_count = 2;
 
   // Set of entities that participate in this Resource.
-  repeated ResourceEntityRef entities = 3;
+  // Status: [Development]
+  repeated ResourceEntityRef entity_refs = 3;
 }
 
+// Status: [Development]
 message ResourceEntityRef {
   // The Schema URL, if known. This is the identifier of the Schema that the entity data
   // is recorded in. To learn more about Schema URL see