patch fetcher: strip metadata suffix from patch file paths

[hamidrezahanafi]

Summary

• support patch references whose path segment includes metadata suffixes like ::version=...&hash=...
• read patch files from the filesystem using only the path part before ::
• add acceptance coverage in protocols/patch.test.ts for metadata-suffixed patch paths

Test plan

• cargo test -p zpm patch -- --nocapture
• Acceptance test added in tests/acceptance-tests/pkg-tests-specs/sources/protocols/patch.test.ts

Made with Cursor

[greptile-apps]

Greptile Overview

Confidence Score: 5/5

• This PR is safe to merge with minimal risk
• The implementation is clean, focused, and well-tested. The patch_file_path helper correctly handles the edge case where :: is absent (via unwrap_or), and the logic only affects filesystem access while preserving the full metadata in the stored reference. The acceptance test validates the expected behavior.
• No files require special attention

Important Files Changed

Filename	Overview
packages/zpm/src/fetchers/patch.rs	Added patch_file_path helper to strip metadata suffixes from patch paths before filesystem access
tests/acceptance-tests/pkg-tests-specs/sources/protocols/patch.test.ts	Added test to verify patch paths with metadata suffixes (e.g. ::version=1.0.0&hash=deadbeef) work correctly

_{Last reviewed commit: c96556d}