Improve CI/CD: add caching, smaller binaries, go mod tidy check

Author: vector76

.github/workflows/ci.yml

@@ -14,5 +14,8 @@ jobs:
       - uses: actions/setup-go@v5
         with:
           go-version-file: go.mod
+          cache: true
+      - name: Check go mod tidy
+        run: go mod tidy && git diff --exit-code go.mod go.sum
       - name: Run tests
         run: go test ./...

.github/workflows/release.yml

@@ -17,14 +17,15 @@ jobs:
       - uses: actions/setup-go@v5
         with:
           go-version-file: go.mod
+          cache: true
 
       - name: Run tests
         run: go test ./...
 
       - name: Build binaries
         run: |
           VERSION=${GITHUB_REF_NAME#v}
-          LDFLAGS="-X 'github.com/yourorg/beads_server/internal/cli.version=${VERSION}'"
+          LDFLAGS="-s -w -X 'github.com/yourorg/beads_server/internal/cli.version=${VERSION}'"
           mkdir -p build
           GOOS=linux   GOARCH=amd64 go build -ldflags="${LDFLAGS}" -o build/bs-linux-amd64       ./cmd/bs
           GOOS=windows GOARCH=amd64 go build -ldflags="${LDFLAGS}" -o build/bs-windows-amd64.exe ./cmd/bs