feat(cli): move cycle log policy to Rust

Move the CLI's strategy-dependent cycle-log calculation behind a scalar Rust ABI shim while retaining the C assertion and call-site behavior.

Test Plan:

- cargo test --manifest-path rust/cli/Cargo.toml --no-default-features --features cli,compression,decompression,benchmark (116 tests)

- cargo clippy --manifest-path rust/cli/Cargo.toml --all-targets with the full CLI feature set

- make -B -C programs -j2 zstd zstd-small zstd-frugal

- make -C tests -j2 test-cli-tests (41 scenarios)

programs/fileio.c

@@ -310,6 +310,7 @@ static int FIO_shouldDisplayMultipleFileSummary(FIO_ctx_t const* fCtx)
 int FIO_rust_checkFilenameCollisions(const char** filenameTable, unsigned nbFiles);
 unsigned FIO_rust_highbit64(unsigned long long v);
 unsigned long long FIO_rust_getLargestFileSize(const char** inFileNames, unsigned nbFiles);
+unsigned FIO_rust_cycleLog(unsigned hashLog, int strategy);
 void FIO_rust_setInBuffer(ZSTD_inBuffer* output, const void* buf, size_t s, size_t pos);
 void FIO_rust_setOutBuffer(ZSTD_outBuffer* output, void* buf, size_t s, size_t pos);
 const char* FIO_rust_determineCompressedName(const char* srcFileName, const char* outDirName, const char* suffix);
@@ -824,9 +825,8 @@ typedef struct {
  *  condition for correct operation : hashLog > 1 */
 static U32 ZSTD_cycleLog(U32 hashLog, ZSTD_strategy strat)
 {
-    U32 const btScale = ((U32)strat >= (U32)ZSTD_btlazy2);
     assert(hashLog > 1);
-    return hashLog - btScale;
+    return FIO_rust_cycleLog(hashLog, (int)strat);
 }
 
 static void FIO_adjustParamsForPatchFromMode(FIO_prefs_t* const prefs,