getStats method
Get stats for a specific tool.
Implementation
ToolStats? getStats(String name) {
final reg = _tools[name];
if (reg == null) return null;
return ToolStats(
name: reg.name,
category: reg.category,
executionCount: reg.executionCount,
avgDurationMs: reg.avgDurationMs,
lastExecutedAt: reg.lastExecutedAt,
enabled: reg.enabled,
restricted: reg.restricted,
);
}