fix: resolve golangci-lint 2.10.1 findings
New rules in golangci-lint 2.10.1:
- modernize/newexpr: replace boolPtr/strPtr/intPtr/ptrStr/ptrFloat/
ptrUint/ptrBool helpers with generic ptr[T] in test files
- staticcheck QF1012: use fmt.Fprintf instead of WriteString(Sprintf)
in Dockerfile generator
- gosec G702/G703/G704/G115/G117: add nolint directives for false
positives (Docker credential helpers, trusted env var paths, configured
HTTP endpoints, platform-safe int conversions)
- Remove unused github.com/replicate/go/types/ptr import
