Update package versions

[Rifdhan]

• Update zod, agents, and hono packages to latest
• Remove zod-to-json-schema package, as zod natively provides the necessary functionality
• Refresh package-lock to pick up latest patch versions of all other packages
• Install lodash + types as an explicit dependency
• Small cleanups and other fixes after upgrades

[gemini-code-assist]

Code Review

This pull request updates several dependencies, including Hono and Zod, adds Lodash, and removes the zod-to-json-schema package. It also refactors tool definitions and cleans up unused imports. Critical issues were identified regarding the use of non-existent package versions in package.json and the invocation of a non-existent z.toJSONSchema method. Additionally, it is recommended to access environment variables via the context object instead of process.env to ensure compatibility with the Cloudflare Workers runtime.

[mouryabalabhadra]

@copilot please review

[Copilot]

@copilot please review

Here's a summary of the changes in this PR:

Dependency updates:

• agents: ^0.2.14 → ^0.13.1
• hono: ^4.10.3 → ^4.12.21
• zod: ^3.24.3 → ^4.4.3
• Removed zod-to-json-schema (zod v4 now provides z.toJSONSchema() natively)
• Added lodash + @types/lodash as explicit dependencies
• Refreshed package-lock.json for all packages

Code cleanups:

• src/servers/tool-definitions.ts: Replaced all zodToJsonSchema(...) calls with z.toJSONSchema(...) and removed unused type aliases (ToolInput, ToolOutput)
• src/handlers.ts: Removed unused imports (AuthRequest, Span, context, trace, any); added as string cast for process.env.OPEN_AI_TOKEN to satisfy Hono's stricter types
• src/servers/mcp-server-base.ts: Removed unused ToolSchema import
• test/handlers.spec.ts: Removed unused waitOnExecutionContext and ThoughtSpotMCP imports

Validation: All 648 tests pass and Biome linting reports no issues.