Use mcdsl/terminal for all password prompts

Replace direct golang.org/x/term calls with mcdsl/terminal.ReadPassword
across mciasctl (6 sites), mciasgrpcctl (1 site), and mciasdb (1 site).
Aligns with the new CLI security standard in engineering-standards.md.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

vendor/google.golang.org/grpc/internal/channelz/trace.go

@@ -194,7 +194,7 @@ func (r RefChannelType) String() string {
 // If channelz is not turned ON, this will simply log the event descriptions.
 func AddTraceEvent(l grpclog.DepthLoggerV2, e Entity, depth int, desc *TraceEvent) {
 	// Log only the trace description associated with the bottom most entity.
-	d := fmt.Sprintf("[%s]%s", e, desc.Desc)
+	d := fmt.Sprintf("[%s] %s", e, desc.Desc)
 	switch desc.Severity {
 	case CtUnknown, CtInfo:
 		l.InfoDepth(depth+1, d)