feat(security): mitigate SSRF and information leakage#672
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Scrape executor: post-DNS resolution validation with pinned-address reqwest client eliminates DNS rebinding TOCTOU. Private host check expanded to block *.localhost, *.internal, *.local domains. A2A server: error responses sanitized to hide serde details and method names. Rate limiter enforces entry cap with 429 rejection on overflow. Redact: regex-based pattern matching replaces whitespace tokenizer, catching secrets in URLs, JSON values, and quoted strings. Added hf_, npm_, dckr_pat_ prefixes. A2A client: upstream error bodies truncated to 256 bytes. Closes #624
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Summary
*.localhost,*.internal,*.localdomainshf_,npm_,dckr_pat_to redaction prefixesTest plan
cargo nextest run --workspace --lib --bins)cargo +nightly fmt --checkcleancargo clippy --workspace -- -D warningscleanCloses #624