## DescriptionKeep graph-expanded local-memory results consistent with
the current-only contract already applied by vector search.Closes
#2209## Type of Change- [x] Bug fix (non-breaking change that fixes an
issue)- [ ] New feature (non-breaking change that adds functionality)- [
] Breaking change (fix or feature that would cause existing
functionality to change)- [ ] Documentation update- [ ] Performance
improvement- [ ] Code refactoring (no functional changes)## Changes
Made- Reject graph-expanded memories whose `valid_until` is set.- Reject
graph-expanded memories whose `superseded_by` is set.- Add focused
coverage for active, expired, and superseded related memories.##
Testing- [x] Unit tests pass (`pytest`)- [x] Linting passes (`ruff check
.`)- [ ] Type checking passes (`mypy headroom`)- [x] New tests added for
new functionality- [ ] Manual testing performed### Test Output```text$
uv run --with pytest --with pytest-asyncio --with numpy pytest
tests/test_memory/test_local_backend_search.py -q3 passed$ uv run --with
ruff ruff check headroom/memory/backends/local.py
tests/test_memory/test_local_backend_search.pyAll checks passed!$ uv run
--with ruff ruff format --check headroom/memory/backends/local.py
tests/test_memory/test_local_backend_search.py2 files already
formatted```## Real Behavior Proof- Environment: Python 3.13, synthetic
in-memory test doubles- Exact command / steps: run the focused test file
above- Observed result: active graph-linked memory is returned; records
with `valid_until` or `superseded_by` are excluded- Not tested: full
repository suite, external vector/graph implementations## Review
Readiness- [x] I have performed a self-review- [x] This PR is ready for
human review## Checklist- [x] My code follows the project's style
guidelines- [x] I have performed a self-review of my code- [ ] I have
commented my code, particularly in hard-to-understand areas- [ ] I have
made corresponding changes to the documentation- [ ] My changes generate
no new warnings- [x] I have added tests that prove my fix is effective
or that my feature works- [x] New and existing unit tests pass locally
with my changes- [ ] I have updated the CHANGELOG.md if applicable##
Screenshots (if applicable)N/A## Additional NotesDocumentation and
changelog changes are not needed for this narrow internal behavior fix.
The existing temporal-history APIs remain unchanged.
Co-authored-by: JerrettDavis <mxjerrett@gmail.com>
