feat: add lab-rv32i-freertos-scheduler-states card

scripts/check_abi.sh

@@ -0,0 +1,35 @@
+#!/usr/bin/env sh
+set -eu
+
+nm=${RISCV_NM:-riscv64-unknown-elf-nm}
+readelf=${RISCV_READELF:-riscv64-unknown-elf-readelf}
+elf=build/task01_scheduler_states/prog.elf
+
+if "$nm" -C -u "$elf" | grep -Eq '__cxa_|_Unwind_|std::|libstdc\+\+'; then
+    echo "unexpected hosted C++ runtime dependency in $elf" >&2
+    "$nm" -C -u "$elf" >&2
+    exit 1
+fi
+
+if "$nm" -C --defined-only "$elf" | grep -Eq \
+    'vtable for|typeinfo for|typeinfo name for'; then
+    echo "unexpected virtual dispatch or RTTI metadata in $elf" >&2
+    exit 1
+fi
+
+if "$readelf" -S "$elf" | grep -Eq \
+    '\.init_array|\.eh_frame|\.gcc_except_table'; then
+    echo "unexpected initializer, exception, or unwind section in $elf" >&2
+    exit 1
+fi
+
+for symbol in g_snapshots g_alternating_tasks g_priority_order
+do
+    if ! "$nm" --defined-only "$elf" | grep -Fq "$symbol"; then
+        echo "missing debugger evidence symbol: $symbol" >&2
+        exit 1
+    fi
+done
+
+echo "PASS ABI: zero-cost Tick/TaskRef wrappers and stable evidence symbols"
+