[BOUNTY] Documentation Sprint - API Reference (#72)

[TheFrogEcliptia]

[BOUNTY] Documentation Sprint - API Reference (#72)

Comprehensive technical guide for all public RustChain network endpoints.

Content:

• Detailed documentation for Attestation, Wallet, Ledger, and Epochs routes.
• Practical JSON payload examples (Request/Response).
• Located at docs/api/endpoints.md.

Closes #72

[Scottcjn]

Closing this as duplicate in the API docs lane during cleanup.

To qualify, submit non-overlapping improvements with command verification and gap analysis (not parallel copies).
You can also pursue #99 or #100 with measurable proof.