Service discovery (#59)

This is the initial pass at service discovery in `Blueprint`. The basic
premise is tp have a service complete a handshake and open a
bi-directional stream `blueprint`. The service then pushes status
updates to `blueprint`.

Author: AndrewSC208

.vscode/launch.json

@@ -37,6 +37,18 @@
                 "CMD": "make_cluster"
             }
         },
+        {
+            "name": "Blueprint CMD: Cluster Stats",
+            "type": "go",
+            "request": "launch",
+            "mode": "auto",
+            "program": "tools/blueprint-client/main.go",
+            "cwd": "${workspaceFolder}",
+            "debugAdapter": "dlv-dap",
+            "env": {
+                "CMD": "cluster_stats"
+            }
+        },
         {
             "name": "Blueprint CMD: Set Test",
             "type": "go",

api/buf.lock

@@ -9,8 +9,8 @@ deps:
   - remote: buf.build
     owner: googleapis
     repository: googleapis
-    commit: 553fd4b4b3a640be9b69a3fa0c17b383
-    digest: shake256:e30e3247f84b7ff9d09941ce391eb4b6f04734e1e5fae796bfc471f167e6f90813630cc39397ee46b8bc0ea7d6935c416d15c219cc5732d9778cbfdf73a1ed6e
+    commit: acd896313c55464b993332136ded1b6e
+    digest: shake256:66626d5e4d9c8ecf25cd72bdbfbbf62b9a68e9e9c33dab6b9b39a53a67063eeba6b8493247dd6d6240b1ac1c32eb2dc311484e67dd7d271884a960c2e5ce8c9a
   - remote: buf.build
     owner: srikrsna
     repository: protoc-gen-gotag

api/core/consensus/fsm/v1/fsm.pb.go

@@ -10,7 +10,7 @@ service Consumer {
     rpc Consume(ConsumeRequest) returns (stream ConsumeResponse) {}
 }
 
-message ConsumeRequest { 
+message ConsumeRequest {
     CloudEvent message = 1;
 }