feat(compress): route complete stream frames through Rust

Route ordinary complete-input ZSTD_compressStream2 calls through the Rust frame compressor while retaining the C state machine for partial, advanced, and dictionary-backed streams. Track explicit maxBlockSize requests so the migrated path preserves the original byte-identical default behavior, and extend the C archive smoke test across context reuse and fallback cases.

Test Plan:

- cargo clippy --manifest-path rust/Cargo.toml

- cargo clippy --manifest-path rust/Cargo.toml --benches

- cargo clippy --manifest-path rust/Cargo.toml --tests

- cargo test --manifest-path rust/Cargo.toml --no-default-features --features compression (133 passed)

- make -B -C tests -j2 test-rust-lib-smoke and ./tests/rustLibSmoke

- make -B -C tests -j2 test-zstream (passed, including both APIs and maxBlockSize case 78)

lib/compress/zstd_compress_internal.h

@@ -518,6 +518,10 @@ struct ZSTD_CCtx_s {
     U32    frameEnded;
     /* The next one-shot stream call may reuse a Rust-compressed frame. */
     unsigned rustSimpleCompress2Completed;
+    /* A caller may explicitly set maxBlockSize to zero.  Keep that request
+     * on the C path so it remains byte-identical to the explicit default
+     * maxBlockSize value. */
+    unsigned rustSimpleCompress2MaxBlockSizeSet;
 
     /* Stable in/out buffer verification */
     ZSTD_inBuffer expectedInBuffer;