Add bounded-stack CI, WOLFCOSE_MIN_BUFFERS, and updated minimal builds#38
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Description
Hacker News feedback (item 48340422) that wolfCOSE's "zero
allocation" framing hid stack usage. The library was already zero-heap; this PR
makes that claim precise, enforces it in CI, adds a constrained-target profile,
and documents a genuinely-minimal wolfCrypt build. No new dynamic allocation is introduced; the library stays zero-heap.
WOLFCOSE_MIN_BUFFERSmacroscripts/check_stack_usage.sh