feat(compress): move dedicated dict support predicate to Rust

Dedicated dictionary search support is a pure compression-parameter policy
check. Move its strategy and hash/chain-log comparisons into the Rust
parameter module behind a by-value ZSTD_compressionParameters ABI, while
leaving the existing C fallback path in createCDict_advanced2 unchanged.

Test Plan:
- `cargo test --manifest-path rust/Cargo.toml --no-default-features --features compression dedicated_dict_search_support_matches_strategy_and_log_boundaries` -- passed
- `make -B -C lib -j2 lib` -- passed
- `make -C tests -j2 fuzzer` -- passed
- `./tests/fuzzer -s4560 -t47 -i48 -v` -- passed
- `cargo clippy --manifest-path rust/Cargo.toml --no-default-features --features compression` -- passed
- The same clippy command with `--benches` and `--tests` -- passed
- `cargo +nightly fmt --manifest-path rust/Cargo.toml` -- passed
- `git diff --cached --check` -- passed

lib/compress/zstd_compress.c

@@ -121,6 +121,7 @@ int ZSTD_rust_params_resolveEnableLdm(
         int mode, ZSTD_compressionParameters cParams);
 int ZSTD_rust_params_resolveExternalRepcodeSearch(int mode, int cLevel);
 int ZSTD_rust_params_cdictIndicesAreTagged(ZSTD_compressionParameters cParams);
+int ZSTD_rust_params_dedicatedDictSearchIsSupported(ZSTD_compressionParameters cParams);
 
 /* CCtx parameter state is mirrored by rust/src/zstd_compress_params_api.rs.
  * Rust owns parameter bounds and clamping; C exposes only the
@@ -912,8 +913,6 @@ size_t ZSTD_CCtx_setPledgedSrcSize(ZSTD_CCtx* cctx, unsigned long long pledgedSr
 static ZSTD_compressionParameters ZSTD_dedicatedDictSearch_getCParams(
         int const compressionLevel,
         size_t const dictSize);
-static int ZSTD_dedicatedDictSearch_isSupported(
-        const ZSTD_compressionParameters* cParams);
 static void ZSTD_dedicatedDictSearch_revertCParams(
         ZSTD_compressionParameters* cParams);
 
@@ -4131,7 +4130,7 @@ ZSTD_CDict* ZSTD_createCDict_advanced2(
             &cctxParams, ZSTD_CONTENTSIZE_UNKNOWN, dictSize, ZSTD_cpm_createCDict);
     }
 
-    if (!ZSTD_dedicatedDictSearch_isSupported(&cParams)) {
+    if (!ZSTD_rust_params_dedicatedDictSearchIsSupported(cParams)) {
         /* Fall back to non-DDSS params */
         cctxParams.enableDedicatedDictSearch = 0;
         cParams = ZSTD_getCParamsFromCCtxParams(
@@ -5675,15 +5674,6 @@ static ZSTD_compressionParameters ZSTD_dedicatedDictSearch_getCParams(int const
     return cParams;
 }
 
-static int ZSTD_dedicatedDictSearch_isSupported(
-        ZSTD_compressionParameters const* cParams)
-{
-    return (cParams->strategy >= ZSTD_greedy)
-        && (cParams->strategy <= ZSTD_lazy2)
-        && (cParams->hashLog > cParams->chainLog)
-        && (cParams->chainLog <= 24);
-}
-
 /**
  * Reverses the adjustment applied to cparams when enabling dedicated dict
  * search. This is used to recover the params set to be used in the working