v0.6.3 - Security fixes + README example fixes

Fixed

Security

• rustls-webpki 0.103.10 → 0.103.13
  • RUSTSEC-2026-0098: name constraints incorrectly accepted for URI names
  • RUSTSEC-2026-0099: name constraints accepted for wildcard certificates
  • RUSTSEC-2026-0104: reachable panic in CRL parsing
• rand 0.8.5 → 0.8.6 (RUSTSEC-2026-0097 unsoundness warning)

Docs (#6)

• README's 8 client.receive() snippets used a stale signature that no longer compiled against the v0.4.0+ Result<Option<ContentBlock>> return type.
• All snippets updated to:

  while let Some(block) = client.receive().await? {
      match block { ... }
  }

• Manual tool execution snippet now clones the borrowed tool_use.input() reference.

Lint

• Fix clippy::unnecessary_sort_by in log_analyzer_agent example (rust 1.95).

Verification

• cargo audit: clean
• cargo test: 151 passed
• cargo clippy --all-targets -- -D warnings: clean
• cargo fmt --check: clean

Install

[dependencies]
open-agent-sdk = "0.6.3"