Fix missing zod locale module

[areibman]

Add zod as a direct dependency and update the package version to fix ERR_MODULE_NOT_FOUND when running via npx.

The ERR_MODULE_NOT_FOUND for zod/v3/locales/en.js occurred because zod was a transitive dependency of @modelcontextprotocol/sdk. When agentops-mcp was run via npx, the temporary installation did not correctly resolve zod's internal module paths, specifically its locales directory. Adding zod as a direct dependency ensures it is properly included and resolved.

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