Load app metadata from companion app_<target>.json file for Rust binaries

[fbeutin-ledger]

No description provided.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 88.46154% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 94.22%. Comparing base (f490198) to head (abfa2c0).

Files with missing lines	Patch %	Lines
src/ledgered/binary.py	88.46%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #61      +/-   ##
==========================================
- Coverage   94.74%   94.22%   -0.53%     
==========================================
  Files          14       14              
  Lines         571      623      +52     
==========================================
+ Hits          541      587      +46     
- Misses         30       36       +6     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[Copilot]

Pull request overview

This PR adds support for loading application metadata from companion JSON files for Rust-based Ledger binaries. Rust applications don't embed app_name, app_version, and app_flags directly in the ELF binary; instead, these values are stored in a separate app_<target>.json file located in the same directory as the binary.

Key Changes:

• Added automatic detection of Rust applications via rust_sdk_name or rust_sdk_version ELF sections
• Implemented JSON metadata loading for Rust apps with comprehensive error handling for missing files, malformed JSON, and partial data
• Added app_flags field to the Sections dataclass to support this metadata

Reviewed changes

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

File	Description
src/ledgered/binary.py	Adds is_rust_app property, _load_metadata_from_json() method, and app_flags field to enable JSON-based metadata loading for Rust binaries
tests/unit/test_binary.py	Comprehensive test coverage including Rust app detection, JSON loading success/failure cases, and verification that C apps ignore JSON files
CHANGELOG.md	Documents the new feature in version 0.15.0 release notes

Comments suppressed due to low confidence (1)

src/ledgered/binary.py:18

• The field app_flags is being added here, but according to the full file content, there appears to be another app_flags field definition at line 31 in the Sections dataclass. Having duplicate field definitions in a dataclass will cause a syntax error. Please verify that there are no duplicate field definitions in the Sections class.

    app_name: Optional[str] = None

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[yogh333]

Not true anymore with this PR.
When it will be merged, this PR is no more needed?

PS. Also, all these data can be retrieved from Cargo.toml.

[fbeutin-ledger]

Not needed anymore, merged on SDK side