feat: publish FreeRTOS C FC11 card

README.md

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+# FC11 — Static and dynamic allocation
+
+This card compares two behaviorally equivalent FreeRTOS object sets. One task,
+queue and timer are allocated through `heap_4`; the other set uses persistent
+application-owned buffers and the `*Static` APIs. Idle and timer-service task
+memory is also supplied by the application, so scheduler startup cannot hide a
+dynamic allocation.
+
+The decisive runtime relation is:
+
+```text
+H1 < H0     dynamic task + queue + timer consume ucHeap
+H2 = H1     static equivalents consume no ucHeap
+H3 = H2     scheduler startup consumes no ucHeap
+```
+
+Both branches receive `0xCAFE` and execute exactly one timer callback. Handles
+of dynamic objects must lie in `ucHeap`; handles of static objects must point to
+named persistent buffers outside that arena.
+
+```sh
+make clean
+make task1 host-test check-abi sim check-determinism
+python3 /home/user/dev/workspace/stem/tools/card-layouts/tools/build_freertos_c_card.py .
+python3 /home/user/dev/workspace/stem/tools/card-layouts/tools/render_card.py .
+```