check-sweep: skip bootloader (bare-metal target, not x86_64-unknown-redox)

bootloader builds for its own custom targets (targets/*.json / UEFI), so
cargo check --target x86_64-unknown-redox mis-reports it (e.g. 'cannot find
macro println'). Exclude it from the sweep to avoid false-positive gating.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

local/scripts/build-redbear.sh

@@ -206,12 +206,21 @@ redbear_check_sweep() {
     log "Check-sweep: cargo check --target $target (pre-build type/borrow check)"
     local -a manifests=() names=()
     local d
+    # Forks that do NOT build for the redox userspace target — checking them with
+    # --target x86_64-unknown-redox is meaningless (false positives). bootloader
+    # is a bare-metal/UEFI crate built for its own custom targets
+    # (targets/*.json), so skip it here.
+    local CHECK_SKIP_FORKS=" bootloader "
     # 1) Fork sources — every target builds these; the recurring compile-error
     #    source (relibc, base, ...). A relibc error here would otherwise only
     #    surface during the prefix rebuild after a multi-minute cook.
     for d in "$PROJECT_ROOT"/local/sources/*/; do
         [ -f "${d}Cargo.toml" ] || continue
-        manifests+=("${d}Cargo.toml"); names+=("$(basename "$d")")
+        local fork_name; fork_name="$(basename "$d")"
+        case "$CHECK_SKIP_FORKS" in *" $fork_name "*)
+            log "  (skip $fork_name — not built for $target)"; continue ;;
+        esac
+        manifests+=("${d}Cargo.toml"); names+=("$fork_name")
     done
     # 2) Local Rust recipes that are in THIS config (target-scoped — a mini build
     #    does not check graphics recipes).