gate CRYPTO AFFINITY under WOLFHSM_CFG_CRYPTO_AFFINITY

[rizlik]

To allow ports that do not support affinity to error out at compile time.

If you think a negative macro is better, I'll do it.

[bigbrett]

@AlexLanzano over to you

[Copilot]

Pull request overview

This PR introduces a compile-time feature flag (WOLFHSM_CFG_CRYPTO_AFFINITY) to explicitly enable/disable per-client crypto affinity, so ports without affinity support can keep the behavior (and API surface) out of the build and avoid accidental usage.

Changes:

• Add WOLFHSM_CFG_CRYPTO_AFFINITY documentation and a config incompatibility check vs WOLFHSM_CFG_NO_CRYPTO.
• Gate server devId selection logic and the client affinity setter/getter behind WOLFHSM_CFG_CRYPTO_AFFINITY.
• Update tests, docs, and CI/build matrix to exercise both affinity-enabled and affinity-disabled builds.

Reviewed changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
wolfhsm/wh_settings.h	Documents the new feature flag and adds a compile-time incompatibility check.
wolfhsm/wh_client.h	Updates API docs to indicate affinity APIs require the new macro.
src/wh_client.c	Wraps wh_Client_SetCryptoAffinity / wh_Client_GetCryptoAffinity implementations with the new macro.
src/wh_server_crypto.c	Uses per-request affinity only when enabled; otherwise always uses the server’s configured devId.
test/wh_test.c	Runs crypto affinity tests only when both callbacks and affinity feature are enabled.
test/wh_test_crypto_affinity.c	Compiles the affinity unit test only when the affinity feature is enabled.
test/Makefile	Adds CRYPTO_AFFINITY=1 knob to define WOLFHSM_CFG_CRYPTO_AFFINITY.
test/wh_test_posix_threadsafe_stress.c	Simplifies counter-phase validation bookkeeping.
docs/src/5-Features.md	Documents that crypto affinity is compile-time gated and API is unavailable when disabled.
docs/draft/crypto_affinity.md	Adds an explicit “compile-time guard” note describing behavior when disabled.
.github/workflows/build-and-test.yml	Adds CI jobs to build/test with crypto affinity enabled (including with DMA).

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