add GetComments and update proto

proto/pkgdash.proto

@@ -78,6 +78,19 @@ service PkgdashService {
       get: "/v1/module";
     };
   };
+  rpc GetComments(GetCommentsReq) returns (GetCommentsRsp) {
+    option (micro.openapiv3.openapiv3_operation) = {
+      operation_id: "GetComments";
+      responses: {
+        default: {
+          reference: {_ref: ".pkgdash.ErrorRsp"};
+        };
+      };
+    };
+    option (micro.api.http) = {
+      get: "/v1/comment";
+    };
+  }
 };
 
 message ErrorRsp {
@@ -120,8 +133,8 @@ message Comment {
   uint64 id = 1 [(validate.rules).uint64.gt = 0];
   uint64 package = 2 [(validate.rules).uint64.gt = 0];
   string text = 3;
-  uint64 created = 4 [(validate.rules).uint64.gt = 0];
-  uint64 updated = 5 [(validate.rules).uint64.gt = 0];
+  string created = 4 ;
+  string updated = 5 ;
 }
 
 message ListPackageReq {}
@@ -169,4 +182,20 @@ message GetModuleReq {
 }
 message GetModuleRsp {
   repeated Module modules = 1 ;
+}
+
+message GetCommentsReq {
+  repeated uint64 id = 1 [(validate.rules).repeated = {
+    unique: true
+    min_items: 1
+    items: {
+      uint64: {
+        gt: 0
+      }
+    }
+  }] ;
+}
+
+message GetCommentsRsp {
+  repeated Comment comments = 1;
 }