feat(ci): introduce check-proto.yaml workflow (#287)

* feat(ci): introduce `check-proto.yaml` workflow

This workflow runs the `protocgen.sh` script via the Makefile and fails
if any files have changed

* fix(delegation): remove proto warning

The `repeated string` type is never nullable

* chore(dogfood): regen the query.proto go files

.github/workflows/check-proto.yaml

@@ -0,0 +1,33 @@
+name: Check Proto Generation
+
+on:
+  pull_request:
+  push:
+    branches:
+      - develop
+      - main
+      - master
+
+permissions:
+  contents: read
+
+jobs:
+  check-proto:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    steps:
+      # Checkout the repository
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      # Run proto generation
+      - name: Run proto-gen
+        run: make proto-gen
+
+      - name: Check if any files have changed post regeneration
+        run: |
+          if ! git diff --exit-code > /dev/null 2>&1; then
+            echo "Changes detected after running 'make proto-gen'."
+            git diff
+            exit 1
+          fi

proto/exocore/delegation/v1/genesis.proto

@@ -42,7 +42,7 @@ message StakersByOperator {
   // which is a combination of the operator address and the asset ID.
   string key = 1;
   // stakers is the stakers list for the above key
-  repeated string stakers = 2 [(gogoproto.nullable) = false];
+  repeated string stakers = 2;
 }
 
 // DelegationsByStaker is a list of delegations for a single staker.