Fix compilation errors from merge conflict in resource versioning

[Copilot]

Merge commit 0cbc51e lost ResourceMetadata, ResourceInfo, and their associated functions (get_build_info, get_resource_info) but retained module registration references, causing compilation failures.

Changes

• Restored missing code from commit 3f66674:

  • ResourceMetadata and ResourceInfo structs with serde derives
  • get_build_info() and get_resource_info() Python bindings

• Fixed type handling:

  • Return Py<PyAny> instead of deprecated PyObject
  • Return item_count as int instead of string for Python interop

• Added robustness:

  • Use option_env!() with fallback for CARGO_PKG_RUST_VERSION
  • Added rust-version = "1.70" to Cargo.toml

Example Usage

from durak import get_build_info, get_resource_info

# Build metadata now accessible
info = get_build_info()
# {'durak_version': '0.4.0', 'rust_version': '1.70', ...}

# Resource checksums with proper types
resources = get_resource_info()
assert isinstance(resources['stopwords_base']['item_count'], int)

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[Copilot]

Pull request overview

This PR restores the resource metadata and versioning bindings that were accidentally dropped in a previous merge, and aligns the crate with a minimum Rust version. It reintroduces the Rust structures and Python-facing functions needed to inspect build metadata and embedded resources, and updates configuration/dependencies accordingly.

Changes:

• Reintroduced ResourceInfo/ResourceMetadata structs and the get_build_info and get_resource_info Python bindings in src/lib.rs, wired into the PyO3 module.
• Ensured build metadata is robust by reading CARGO_PKG_RUST_VERSION via option_env! with a "1.70" fallback and by parsing embedded resources/metadata.json.
• Declared rust-version = "1.70" in Cargo.toml and updated Cargo.lock to include serde/serde_json and their transitive dependencies.

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated 2 comments.

File	Description
src/lib.rs	Restores resource metadata structs and Python APIs, parses embedded RESOURCE_METADATA, and registers the new functions in the PyO3 module.
Cargo.toml	Sets the crate’s minimum supported Rust version to 1.70 to match the metadata reported by get_build_info.
Cargo.lock	Updates lockfile to include serde, serde_json, and related dependencies needed for the new metadata parsing.

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[Copilot]

Using expect on serde_json::from_str(RESOURCE_METADATA) inside a #[pyfunction] will turn JSON parse failures into a Rust panic, which surfaces to Python as a less-informative error and can impact reliability; it would be safer to map the parse error into a PyErr (e.g., returning a Python exception) rather than panicking.

[Copilot]

get_build_info/get_resource_info introduce new observable behavior but there are no unit tests covering them, while this file already has tests for other core functions; consider adding tests that exercise their happy-path behavior (e.g., keys present, item_count type) and failure modes (e.g., malformed RESOURCE_METADATA).