halvorai-ingest 0.1.0 (developer preview)

• HalvorClient: batched, signed (EdDSA) event delivery; emit never raises.
• agent_context: attributes payments to an agent, owner and instruction; instruction text is hashed locally.
• Offline mode: pass sink to receive signed envelopes without an account; generate_source_key makes a signing key.
• sign_event / verify_event: detached JWS over the JCS form, byte-identical to the Node.js SDK.
• x402: wrap_httpx observes payment requirements, payloads and settlement responses.
• Events follow APE v0.1.