Update cockroachdb description + author per developer request

- Description: expand to reflect current capabilities (14 tools, 2 MCP
  backends, 3 agents, 32 skills, safety hooks)
- Author: "CockroachDB" → "Cockroach Labs" (company name)

.claude-plugin/marketplace.json

@@ -357,9 +357,9 @@
     },
     {
       "name": "cockroachdb",
-      "description": "CockroachDB plugin for Claude Code — explore schemas, write optimized SQL, debug queries, and manage distributed database clusters directly from your AI coding agent.",
+      "description": "Connect Claude Code directly to your CockroachDB clusters for hands-on database work — explore schemas, write optimized SQL, debug queries, and manage distributed database clusters. This plugin provides 14 tools across two active MCP backends (self-hosted MCP Toolbox and managed CockroachDB Cloud MCP Server), three specialized agents (DBA, Developer, Operator), 32 skills across 6 operational domains, and built-in safety hooks.",
       "author": {
-        "name": "CockroachDB"
+        "name": "Cockroach Labs"
       },
       "category": "database",
       "source": {