chore(lint): suppress dead_code warnings for const-eval functions to address MSRV-specific lint behavior

src/chain/impact.rs

@@ -163,6 +163,7 @@ const _: () = assert!(
 
 /// Union of every cap bit referenced by an [`IMPACT_LATTICE`] rule, as
 /// `source_cap` or `adjacent_cap`.  Computed at compile time.
+#[allow(dead_code)] // Called from a const assertion; MSRV lints may miss const-eval uses.
 const fn rule_coverage_bits() -> u32 {
     let mut acc: u32 = 0;
     let mut i = 0;

src/dynamic/corpus/audit.rs

@@ -24,6 +24,7 @@ use super::registry::{CORPUS, CORPUS_UNSUPPORTED_LANG_NEUTRAL};
 use crate::labels::Cap;
 
 /// Byte-level equality for `&'static str` usable in const eval.
+#[allow(dead_code)] // Called from const-eval audit helpers on MSRV/CI compilers.
 const fn str_eq(a: &str, b: &str) -> bool {
     let ab = a.as_bytes();
     let bb = b.as_bytes();
@@ -43,6 +44,7 @@ const fn str_eq(a: &str, b: &str) -> bool {
 /// Walk every `(cap, lang)` slice; for each non-benign payload check that
 /// either its `benign_control.label` resolves inside the same slice or it
 /// carries a non-empty `no_benign_control_rationale`.
+#[allow(dead_code)] // Called from a const assertion; MSRV lints may miss const-eval uses.
 const fn audit_benign_controls() -> bool {
     let entries = CORPUS.entries;
     let mut e = 0;

src/dynamic/telemetry.rs

@@ -68,6 +68,7 @@ pub const CORPUS_VERSION: &str = "17";
 /// is caught at `cargo build` rather than at test time.
 const _: () = assert_corpus_version_str_matches_u32();
 
+#[allow(dead_code)] // Called from a const assertion; MSRV lints may miss const-eval uses.
 const fn assert_corpus_version_str_matches_u32() {
     let int_val = crate::dynamic::corpus::CORPUS_VERSION;
     let bytes = CORPUS_VERSION.as_bytes();