Update private core snapshot to netft-cpp v0.1.3

[han-xudong]

Summary

• update the private netft-cpp core snapshot to v0.1.3
• preserve the configured UDP receive deadline across repeated EINTR interruptions
• add the upstream POSIX transport regression suite
• prepare package version 0.3.1

Verification

• pure unit suite: 143 passed, 1 skipped
• private core suite: 15 passed
• Noetic build, tests, and smoke test
• Humble, Jazzy, Kilted, Lyrical, and Rolling builds, tests, node smoke tests, and ros2_control smoke tests
• snapshot sources and regression test match netft-cpp v0.1.3 exactly

Summary by CodeRabbit

• Bug Fixes

  • Fixed UDP receive timeouts so repeated interruptions no longer extend the configured timeout.
  • Preserved expected handling for connection errors, invalid descriptors, interrupted reads, and oversized timeouts.

• Tests

  • Added comprehensive coverage for interrupted polling, timeout expiration, transport errors, datagram reads, and send/receive behavior.

• Documentation

  • Updated core provenance information and changelog details for the included upstream snapshot.

• Release

  • Bumped the package version to 0.3.1.

[coderabbitai]

📝 Walkthrough

Walkthrough

The PR updates the POSIX receive timeout logic to preserve deadlines across EINTR, adds deterministic transport regression tests, and bumps package and embedded core snapshot metadata to versions 0.3.1 and v0.1.3.

Changes

POSIX timeout correction and release

Layer / File(s)	Summary
Deadline-based poll interruption handling src/core/src/detail/posix_transport.cpp	PosixTransport::receive now recalculates remaining timeout from a steady-clock deadline after interrupted poll() calls.
Transport regression coverage test/core/CMakeLists.txt, test/core/test_posix_transport.cpp	Adds wrapped POSIX system-call tests covering interrupted polls, deadlines, errors, connection state, datagrams, and timeout saturation.
Snapshot and package version updates src/core/UPSTREAM, package.xml, pixi.toml, README.md, CHANGELOG.rst	Records the v0.1.3 core snapshot and updates project version metadata and release documentation.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Possibly related issues

• Preserve receive timeout across EINTR retries netft-cpp#5 — Directly addresses the deadline-based PosixTransport::receive EINTR retry fix and its regression coverage.

Possibly related PRs

• netft/ros-netft#9 — Introduced the private core snapshot containing the updated PosixTransport implementation.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the main change: updating the private core snapshot to netft-cpp v0.1.3.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch release/0.3.1

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

📢 Thoughts on this report? Let us know!

[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@test/core/test_posix_transport.cpp`:
- Around line 68-82: Make the EINTR regression cases in __wrap_poll
deterministic by removing real sleep_for-based timing and using an injectable or
controllable clock/time seam in the upstream production path, then synchronize
the corresponding src/core snapshot. Preserve the intended EintrPastDeadline and
RepeatedEintrThenTimeout behaviors and the expected four-poll coverage without
relying on wall-clock scheduling.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: e2e359f9-803d-49f1-a75c-cc827b80fac6

📥 Commits

Reviewing files that changed from the base of the PR and between 33597c7 and 8b746bc.

📒 Files selected for processing (8)

• CHANGELOG.rst
• README.md
• package.xml
• pixi.toml
• src/core/UPSTREAM
• src/core/src/detail/posix_transport.cpp
• test/core/CMakeLists.txt
• test/core/test_posix_transport.cpp