Add AGI Jobs CLI payloads and lifecycle utilities

[MontrealAI]

Summary

• add a dedicated jobs service for building AGI Jobs transaction payloads and decoding job status responses
• extend the CLI with an operator-facing jobs command suite for applying, completing, acknowledging, and monitoring jobs
• update the README to document the new job lifecycle tooling and reinforce AGI Jobs convergence guidance
• cover the jobs service with Vitest cases to ensure deterministic payload encoding and status decoding

Testing

• npm run lint
• npm test

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Codex Task

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Allow hex result data in job completion hashing

When buildCompleteJobTx is given resultData as a hex string, normalizeResultHash takes the string branch but then rejects it because it is not a Uint8Array. The error text explicitly claims hex strings are supported, so callers using jobs complete --result-data 0x… will always fail before hashing. Convert hex strings to bytes (e.g. arrayify) instead of throwing so that both UTF‑8 and hex inputs work as documented.

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