Fix tools/list error by pinning SDK and Zod versions

The hosted MCP server at mcp.socket.dev fails on tools/list with:
"Cannot read properties of null (reading '_def')"

This is caused by Zod version incompatibility. SDK 1.25.x requires
zod ^3.25 which has internal _def structure changes that break
schema serialization.

Changes:
- Pin @modelcontextprotocol/sdk to 1.22.0 (last version using zod ^3.23.8)
- Pin zod to 3.24.1
- Add overrides to force all transitive deps to use compatible versions

Author: dc-larsen