feat: add raccoon proto

buf.yaml

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+version: v1beta1
+build:
+  roots:
+    - ./src
+breaking:
+  use:
+    - WIRE

src/odpf/proton/raccoon/Event.proto

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+syntax = "proto3";
+
+package odpf.proton.raccoon;
+
+option java_multiple_files = true;
+option java_package = "io.odpf.proton.raccoon";
+option java_outer_classname = "EventProto";
+
+message Event {
+  // Data/byteArray of the serialised product proto.
+  bytes eventBytes = 1;
+  /* This is the protoMessageName which the protoc provides with each compiled proto.
+    This type is used by raccoon to distribute events to respective Kafka topics.
+  */
+  string type = 2;
+ }

src/odpf/proton/raccoon/EventRequest.proto

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+syntax = "proto3";
+
+package odpf.proton.raccoon;
+
+option java_multiple_files = true;
+option java_package = "io.odpf.proton.raccoon";
+option java_outer_classname = "EventRequestProto";
+
+import "odpf/proton/raccoon/Event.proto";
+import "google/protobuf/timestamp.proto";
+
+message EventRequest {
+  string req_guid = 1;
+  google.protobuf.Timestamp sent_time = 2;
+  repeated Event events = 3;
+}

src/odpf/proton/raccoon/EventResponse.proto

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+syntax = "proto3";
+
+package odpf.proton.raccoon;
+
+option java_multiple_files = true;
+option java_package = "io.odpf.proton.raccoon";
+option java_outer_classname = "EventResponseProto";
+
+message EventResponse {
+  Status status = 1;
+  Code code = 2;
+  int64 sent_time = 3;
+  string reason = 4;
+  map<string, string> data = 5;
+}
+
+enum Status {
+    UNKNOWN_STATUS = 0;
+    SUCCESS = 1;
+    ERROR = 2;
+}
+
+enum Code {
+    UNKNOWN_CODE = 0;
+    OK = 1;
+    BAD_REQUEST = 2;
+    INTERNAL_ERROR = 3;
+    MAX_CONNECTION_LIMIT_REACHED = 4;
+    MAX_USER_LIMIT_REACHED = 5;
+}