Fix goconst linter warnings by converting repeated strings to constants

- Added testUserAlice constant for 'alice' in test files
- Added windowsOS constant for 'windows' in test files
- Added testIssueBD1/testIssueBD2 constants for 'bd-1'/'bd-2' in test files
- Added testVersion100 constant for '1.0.0' in version tests
- Added testIssueCustom1 constant for 'custom-1' in lazy init tests

Closes bd-54

Amp-Thread-ID: https://ampcode.com/threads/T-0a4e5d44-2d95-4948-8f4a-d8facf8657c7
Co-authored-by: Amp <amp@ampcode.com>

cmd/bd/daemon_test.go

@@ -18,11 +18,13 @@ import (
 	"github.com/steveyegge/beads/internal/types"
 )
 
+const windowsOS = "windows"
+
 func makeSocketTempDir(t testing.TB) string {
 	t.Helper()
 
 	base := "/tmp"
-	if runtime.GOOS == "windows" {
+	if runtime.GOOS == windowsOS {
 		base = os.TempDir()
 	} else if _, err := os.Stat(base); err != nil {
 		base = os.TempDir()