ci: clean up workflow (#3)

## Description

The current CI workflow was auto-generated by Claude, and is really not intuitive. Fixing it up to make it work better.

- Add names for jobs in workflow.
- Rename workflow to `ci.yml`.
- Added `go mod tidy` as a tasks in the `lint` job.

### Decisions

- Chose not to use emojis for workflow or job names. While they look nice, they are unprofessional, and harder to `grep`.

Reviewed-on: #3
Co-authored-by: M.V. Hutz <git@maximhutz.me>
Co-committed-by: M.V. Hutz <git@maximhutz.me>

.gitea/workflows/ci.yml

@@ -1,9 +1,5 @@
 name: CI
 
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: true
-
 on:
   push:
     branches: [main]
@@ -11,6 +7,7 @@ on:
 
 jobs:
   lint:
+    name: Golang Lint
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
@@ -19,11 +16,15 @@ jobs:
         with:
           go-version-file: go.mod
 
+      - name: Check go mod tidy
+        run: go mod tidy && git diff --exit-code go.mod go.sum
+
       - uses: golangci/golangci-lint-action@v7
         with:
           version: latest
 
   unit-test:
+    name: Unit Tests
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
@@ -36,6 +37,7 @@ jobs:
         run: go test ./... -cover -v
 
   fuzz-test:
+    name: Fuzz Tests
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
@@ -51,6 +53,7 @@ jobs:
           done
 
   mutation-test:
+    name: Mutation Tests
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4

go.sum

@@ -4,6 +4,7 @@ github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZb
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
 github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=