fix(deps): green the cargo audit gate on origin/master

.github/workflows/ci.yml

@@ -129,6 +129,43 @@ jobs:
         working-directory: audio-graph/src-tauri
         run: cargo audit
 
+      # `ignore` in audit.toml is an unconditional advisory-ID suppression, so a
+      # stanza whose justification is "this package is unreachable" would keep
+      # passing after the package became reachable. The RUSTSEC-2026-0235
+      # (rkyv 0.7.46) stanza states exactly that condition and names this command
+      # as its own remediation trigger, so assert it here rather than trusting a
+      # reader to re-run it by hand.
+      #
+      # Matched against the advisory's AFFECTED RANGE (patched is ">= 0.8.17"),
+      # not a pinned version: a check keyed on rkyv@0.7.46 alone would pass
+      # silently if the lockfile later resolved 0.7.47 or 0.8.10, both still
+      # vulnerable and both still suppressed by the ID-level ignore.
+      #
+      # Version logic unit-checked against synthetic input before landing:
+      # 0.7.46 and 0.8.16 flag; 0.8.17, 0.9.0, and 1.0.0 do not.
+      - name: Assert no affected rkyv is reachable
+        working-directory: audio-graph/src-tauri
+        run: |
+          affected="$(
+            cargo tree --locked --target all --all-features --edges all \
+              --format '{p}' --prefix none 2>/dev/null \
+            | awk '
+                $1 == "rkyv" {
+                  v = $2; sub(/^v/, "", v);
+                  split(v, p, ".");
+                  if ((p[1]+0) == 0 && ((p[2]+0) < 8 || ((p[2]+0) == 8 && (p[3]+0) < 17)))
+                    print $1 " " $2;
+                }' \
+            | sort -u
+          )"
+          if [ -n "$affected" ]; then
+            echo "::error::RUSTSEC-2026-0235's ignore in .cargo/audit.toml is justified only while no affected rkyv (< 0.8.17) is reachable, but one now is:"
+            printf '%s\n' "$affected"
+            echo "::error::Remove that ignore and resolve the advisory, or replace its justification with one that matches reality."
+            exit 1
+          fi
+          echo "No affected rkyv (< 0.8.17) is reachable; the RUSTSEC-2026-0235 ignore stays justified."
+
   # ── Rust backend — Linux ───────────────────────────────────────────
   # Tests use `tauri::test::mock_context` + `noop_assets` + `any_thread()`
   # in src/speech/tests_integration.rs. Even with MockRuntime, tao's Linux

src-tauri/.cargo/audit.toml

@@ -65,6 +65,28 @@ ignore = [
     "RUSTSEC-2025-0100",
     "RUSTSEC-2025-0119",
 
+    # ── Resolver-retained rust_decimal rkyv 0.7 edge (inactive) ─────
+    # Source: Cargo.lock retains rust_decimal 1.42.1's optional
+    # `rkyv = "^0.7.46"` dependency even though no AudioGraph feature enables it.
+    # Blocker: rust_decimal 1.42.1 requires optional rkyv ^0.7.46; patched rkyv
+    # 0.8.17 is semver-incompatible with that requirement. Manual lock-stanza
+    # pruning is resolver-unstable because Cargo retains/re-adds the declared
+    # optional edge. Seed audio-graph-c65d separately owns the independent
+    # ci/storage-probe lock graph; its resolution is not covered by this ignore.
+    # Crate: rkyv  Title: Insufficient archive validation can cause out-of-bounds
+    # reads in archives containing Rc/Arc.
+    # Reachability: `cargo tree --locked --offline -i rkyv@0.7.46 --target all
+    # --all-features --edges all` prints no reverse dependency; default and
+    # cloud-only resolution do not contain the package at all. Therefore the
+    # affected checked archive-access/deserialization APIs are not compiled into
+    # any current AudioGraph feature set.
+    # Risk acceptance: lockfile-scanner finding only while that edge stays
+    # inactive. Do not use this exception if a feature activates rkyv 0.7.
+    # Remediation: remove immediately if any default/cloud/all-features tree makes
+    # the command above non-empty. Otherwise remove when rust_decimal drops or
+    # raises the optional 0.7 requirement so a targeted lock update prunes it.
+    "RUSTSEC-2026-0235", # rkyv 0.7.46: inactive resolver-retained optional edge
+
     # ── SurrealDB embedded adapter (gated, non-default, conformance-only) ──
     # Source: transitive via the optional `surrealdb-embedded` feature →
     # surrealdb 3.1.x → rsa 0.9.10 (pulled by surrealdb's RPC/auth stack).