pub const REDACTED_PLACEHOLDER: &str = "<redacted>";Expand description
#1558 batch 5 wave 3 — canonical secret-redaction placeholder
rendered by every Debug impl that masks credential material
(AppConfig.api_key, [llm].api_key, ResolvedLlm.api_key,
HooksSubscriptionConfig.hmac_secret, x25519 Keypair.secret,
RuntimeContext.hooks_hmac_secret). One spelling, hoist-only;
src/llm.rs keeps its own site per the vendor carve-out.