fix(init): normalize bare CR to LF in captured logs

The runtime emits multi-line records (e.g. an unhandled-init traceback) as a single
log frame with internal newlines replaced by bare carriage returns. AWS renders
these back as line feeds, so convert bare CR to LF in the assembled log output while
preserving genuine CRLF endings (which AWS keeps, e.g. the LAMBDA_WARNING line).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: joe4dev

cmd/localstack/logs.go

@@ -38,8 +38,17 @@ func (lc *LogCollector) reset() {
 func (lc *LogCollector) getLogs() lsapi.LogResponse {
 	lc.mutex.Lock()
 	defer lc.mutex.Unlock()
+	logs := strings.Join(lc.RuntimeLogs, "")
+	// The runtime emits multi-line records (e.g. an unhandled-init traceback) as a single log
+	// frame with internal newlines replaced by bare carriage returns. AWS renders those back as
+	// line feeds, so convert bare CR to LF while preserving genuine CRLF line endings (which AWS
+	// keeps verbatim, e.g. the LAMBDA_WARNING line).
+	const crlfPlaceholder = "\x00"
+	logs = strings.ReplaceAll(logs, "\r\n", crlfPlaceholder)
+	logs = strings.ReplaceAll(logs, "\r", "\n")
+	logs = strings.ReplaceAll(logs, crlfPlaceholder, "\r\n")
 	response := lsapi.LogResponse{
-		Logs: strings.Join(lc.RuntimeLogs, ""),
+		Logs: logs,
 	}
 	lc.RuntimeLogs = []string{}
 	return response