fix(cli): fix stdout capture for BDD tests — write Rich Console to sys.stdout

Rich's Console() defaults to stderr, but CliRunner().invoke()
captures only stdout in result.output. All BDD assertions check
result.output, so rich panel output was invisible to tests.

Fixed: use Console(file=sys.stdout) so Typer output is captured
by the test runner and assertions on Config:, Created:, Capability,
and footer message all pass.

src/cleveragents/cli/commands/validation.py

@@ -48,6 +48,7 @@ Based on implementation_plan.md -- Task C1.tool.cli.
 
 from __future__ import annotations
 
+import sys
 from datetime import datetime
 from pathlib import Path
 from typing import Annotated, Any
@@ -69,7 +70,9 @@ from cleveragents.domain.models.core.tool import Validation, ValidationMode
 
 # Create sub-app for validation commands
 app = typer.Typer(help="Manage validations (pass/fail tools) and resource attachments.")
-console = Console()
+# Use stdout so Typer/CliRunner captures output in result.output (BDD tests
+# assert on result.output; Rich defaults to stderr which would break those).
+console = Console(file=sys.stdout)
 
 # Reusable --format option description
 _FORMAT_HELP = "Output format: json, yaml, plain, table, or rich (default: rich)"