feat(mcp): add autonomous compute provisioning tool for AI agents

[vhtgzzl]

Summary

Adds an on-demand cloud compute provisioning tool adapter (sapiom_provision_compute) compliant with the Model Context Protocol (MCP) standard, enabling autonomous agents to provision CPU/GPU instances via Sapiom agentic rails with enforced budget limits.

Key Features

• MCP Tool Definition & Handler: Fully typed schema matching @modelcontextprotocol/sdk tool requirements.
• Budget Guardrails: Validates instance hourly rate against maxDurationHours and maxBudgetUsd to prevent runaway agent billing.
• Runtime Validation: Strict schema parsing for parameters (instanceType,
  egion, maxDurationHours, maxBudgetUsd) using Zod.
• Vitest Suite: Covers valid provisioning, budget overflow rejection, MCP protocol payload handling, and validation error responses.