Erik JohnstonandClaude Fable 5.1 a67156e52b Port the lazy-loaded members cache to Rust ...

`LazyLoadedMembersCache` as it is on develop after #20289: an LRU of the
members sent to a device, each stamped with the room position of the
response that carried it, and `start_request` forgetting the entries
recorded after the request's `since`. The per-device caches expire
after thirty minutes without use, as the Python `ExpiringCache` does.

The Rust sync handler holds them, not the store: they are per device and
no data change invalidates them. `SyncHandler.start_request` is its
first entry point.

`tests/sync/test_rust_ll_members.py` mirrors the Python cache's tests
and runs random operation sequences, with multi-writer positions,
through both.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0194eNQP5weBtVMg8NKtc6VU

2026-10-14 13:35:25 +00:00

..

__init__.py

…

fixtures.py

…

test_rust_filter.py

Port the sync filters to Rust

2026-10-14 13:35:25 +00:00

test_rust_ll_members.py

Port the lazy-loaded members cache to Rust

2026-10-14 13:35:25 +00:00

test_rust_state_delta.py

Port the sync state delta arithmetic to Rust

2026-10-14 13:35:25 +00:00

test_rust_stream_token.py

…

test_rust_visibility.py

Port the client visibility checks to Rust

2026-10-14 13:35:25 +00:00