fix: support building against rocksdb-11

[jansegre]

Build broke on macOS after rocksdb was updated to v11 on homebrew. This PR introduces a small shim to to fix support and restore compatibility.

[Copilot]

Pull request overview

This PR restores build compatibility with RocksDB v11 by introducing a C++ shim layer that normalizes the rocksdb::DB::Open* APIs across RocksDB versions, and updating the Cython bindings to call through that shim.

Changes:

• Added rocksdb/cpp/db_helpers.hpp to provide py_rocks::DBOpen* wrappers that adapt RocksDB’s newer std::unique_ptr-based Open* APIs to the existing DB** shape used by the Cython bindings.
• Updated rocksdb/db.pxd to bind DB_Open* symbols to the new shim functions.
• Updated DB.close() to explicitly destroy the native rocksdb::DB* after Close().
• Bumped package version to 0.10.1.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
rocksdb/db.pxd	Redirects DB open bindings to shim functions in cpp/db_helpers.hpp, and exposes DB_Destroy.
rocksdb/cpp/db_helpers.hpp	New compatibility wrappers for RocksDB DB::Open* / OpenAsSecondary* / OpenForReadOnly* across versions.
rocksdb/_rocksdb.pyx	Ensures the native rocksdb::DB* is deleted during DB.close() to avoid leaks and match new open behavior.
pyproject.toml	Version bump to 0.10.1.

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[luislhl]

Maybe this is important to be able to avoid corrupting the DB in certain situations?

[jansegre]

On rocksdb, a close cannot fail, if anything errors it's left on the filesystem, not on the DB struct.