style: apply gofmt

Estate-wide consolidation pass. golangci-lint v2 default set enables NO
formatter, so gofmt drift accumulated silently across the estate -- 8 repos
were carrying it, this one included. Same hole that let two files rot in
dma-cli until they were found by hand (dma-cli#12).

Mechanical and deterministic: `gofmt -w`, nothing hand-edited. Verified
before commit -- gofmt -l now reports 0, go build and go vet both pass.

Clears this repo to adopt the canonical .golangci.yml (infra
ci-templates/golangci.yml, infra#309 pattern) in a later wave.

internal/gitea/client_guard_test.go

@@ -27,8 +27,8 @@ func TestEmptyPathSegmentRejectedBeforeNetwork(t *testing.T) {
 	c := gitea.NewClient(srv.URL, "tok")
 
 	paths := []string{
-		"/api/v1/repos/mathias//issues",        // empty repo
-		"/api/v1/repos//gitea-mcp/contents/",    // empty owner
+		"/api/v1/repos/mathias//issues",            // empty repo
+		"/api/v1/repos//gitea-mcp/contents/",       // empty owner
 		"/api/v1/repos/mathias//issues?state=open", // empty repo before query
 	}
 	for _, p := range paths {