fix(ci): use Makefile for linting instead of golangci-lint-action

- Replace golangci-lint-action with make lint-only command
- Remove unnecessary Go setup and dependency installation
- Use Docker-based linting for consistency with local development
- Remove continue-on-error to ensure linting issues are caught

Author: d0ugal

.github/workflows/ci.yml

@@ -41,18 +41,15 @@ jobs:
   lint:
     name: Lint
     runs-on: ubuntu-latest
-    continue-on-error: true
 
     steps:
     - name: Checkout code
       uses: actions/checkout@v5
       with:
         fetch-depth: 0
 
-    - name: Run golangci-lint
-      uses: golangci/golangci-lint-action@v8
-      with:
-        version: latest
+    - name: Run linting using Makefile
+      run: make lint-only
 
   build:
     name: Build