Add cyan color to channel fingerprint in CLI info

Private channel fingerprints now display in cyan to stand out.

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/stegasoo/cli.py

@@ -857,7 +857,7 @@ def info(ctx, full):
         # Channel
         if channel_fingerprint:
             masked = f"{channel_fingerprint[:4]}••••••••{channel_fingerprint[-4:]}"
-            click.echo(f"  Channel:     {masked}")
+            click.echo(f"  Channel:     \033[36m{masked}\033[0m")  # Cyan for private channel
         else:
             click.echo("  Channel:     \033[33mpublic\033[0m")