feat(compress): move static CDict sizing into Rust

Route ZSTD_initStaticCDict() workspace-size calculation through the Rust
CDict sizing policy, including the by-reference/by-copy, resolved row
match-finder, and dedicated-search branches. Keep private layout constants
at the C boundary and retain C ownership of static workspace construction
and dictionary initialization.

Remove the obsolete C match-state sizing adapter now that no C path calls
it, avoiding a dead implementation after the sizing migration.

Test Plan:
- ulimit -v 41943040 && CARGO_BUILD_JOBS=1 cargo test --manifest-path rust/Cargo.toml
- ulimit -v 41943040 && CARGO_BUILD_JOBS=1 cargo clippy --manifest-path rust/Cargo.toml --all-targets -- -D warnings
- ulimit -v 41943040 && make -j1
- ulimit -v 41943040 && make -j1 -C tests test-zstream ZSTREAM_TESTTIME=-T2s
- ulimit -v 41943040 && make -j1 -C tests test-fuzzer FUZZERTEST=-T3s FUZZER_FLAGS=--no-big-tests
- ulimit -v 41943040 && cargo fmt --manifest-path rust/Cargo.toml -- --check
- git diff --check

rust/src/zstd_compress_params.rs

@@ -1218,7 +1218,7 @@ pub struct ZSTD_rustMatchStateSizing {
     pub asanRedzoneSize: usize,
 }
 
-/// C-only layout inputs for `ZSTD_estimateCDictSize_advanced()`.
+/// C-only layout inputs for CDict workspace-size formulas.
 #[repr(C)]
 #[derive(Clone, Copy, Debug, Default)]
 pub struct ZSTD_rustCDictSizing {
@@ -2689,6 +2689,29 @@ mod tests {
             },
             by_ref
         );
+
+        let resolved_row_match_finder = resolve_row_match_finder(ZSTD_RUST_PS_AUTO, cparams);
+        let static_cdict = estimate_cdict_size_from_cparams(
+            123,
+            cparams,
+            1,
+            resolved_row_match_finder,
+            true,
+            sizing,
+        );
+        assert_eq!(
+            unsafe {
+                ZSTD_rust_params_estimateCDictWorkspaceSize(
+                    123,
+                    cparams,
+                    1,
+                    resolved_row_match_finder,
+                    1,
+                    &sizing,
+                )
+            },
+            static_cdict
+        );
     }
 
     #[test]