feat(erc8128): signed http requests

[jxom]

Summary

Adds modules for ERC-8128/RFC9421 (Signed HTTP Requests).

Details

• Added HttpSignature module with getSignPayload, serialize, toRequest, and fromRequest for RFC 9421 HTTP Message Signatures with Ethereum accounts (ERC-191).
• Added ContentDigest module with compute, serialize, deserialize, and verify for RFC 9530 Content-Digest headers.
• Accepts both plain request objects and Fetch API Request.
• Supports custom components for class-bound signatures.
• Internal modules for KeyId and HttpSignatureInput serialization.
• SF-string quoting per RFC 8941.

Modules Touched

• ERC-8128 HTTP Signatures: HttpSignature
• RFC 9530 Content-Digest: ContentDigest

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Project	Deployment	Actions	Updated (UTC)
ox	Error		Mar 25, 2026 2:47am

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commit: 3e06187