feat: save tools input schema

[cristipufu]

Summary

This PR adds the tool input schema to the registration payload and refines HTTP error handling during registration.

• Include InputSchema in the tool_info payload
• Update exception handling to log details for HTTP errors

[Copilot]

Pull Request Overview

This PR adds the tool input schema to the registration payload and refines HTTP error handling during registration.

• Include InputSchema in the tool_info payload
• Remove debug logging of client_info
• Update exception handling to log details for HTTP errors

Comments suppressed due to low confidence (2)

src/uipath_mcp/_cli/_runtime/_runtime.py:399

• Double-encoding the schema as a JSON string may complicate downstream parsing. Consider passing the raw object (InputSchema: tool.inputSchema or {}) so it serializes as JSON only once.

                    else "{}",

src/uipath_mcp/_cli/_runtime/_runtime.py:399

• Add unit tests to verify the registration payload includes InputSchema when defined and defaults to an empty object when missing.

                    else "{}",