fix: show server name in instances table, allow logs by server name

- Instance list now shows server NAME instead of cryptic server ID
- Include server relation in findAll query (Prisma include)
- Logs command accepts server name, server ID, or instance ID
  (resolves server name → first RUNNING instance)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/mcpd/src/repositories/mcp-instance.repository.ts

@@ -11,6 +11,7 @@ export class McpInstanceRepository implements IMcpInstanceRepository {
     }
     return this.prisma.mcpInstance.findMany({
       where,
+      include: { server: { select: { name: true } } },
       orderBy: { createdAt: 'desc' },
     });
   }