fix: remove coverage profile flag to fix Windows test failure

The -coverprofile flag with output file was causing Windows to interpret
the .txt file as a package name. Simplified test command to work across
all platforms.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: kevinelliott

.github/workflows/test.yml

@@ -41,7 +41,7 @@ jobs:
         run: go mod download
 
       - name: Run tests
-        run: go test -v -race -coverprofile=coverage.txt -covermode=atomic ./...
+        run: go test -v -race ./...
 
       - name: Build
         run: go build -v ./...