Changelog - aimdb-executor

All notable changes to the aimdb-executor crate will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

Unreleased

Spawn trait deleted (Issue #88). Including the SpawnToken associated type and the ExecutorError::SpawnFailed variant. The Runtime bundle trait is now RuntimeAdapter + TimeOps + Logger (no Spawn supertrait). Task execution moves to AimDbRunner::run() in aimdb-core, which drives every collected future via a single FuturesUnordered. Custom adapters must drop impl Spawn.
JoinFanInRuntime supertrait relaxed from Spawn to RuntimeAdapter.

futures-util (alloc-only) as a regular dependency — provides FuturesUnordered used by aimdb-core's AimDbRunner.

TimeOps::duration_as_nanos — new required method on the TimeOps trait that returns the number of whole nanoseconds in a Self::Duration. Introduced for stage profiling (Issue #58) so features can convert elapsed time to a numeric, runtime-agnostic representation without binding to std::time. Implementations should saturate rather than overflow for durations larger than u64::MAX nanoseconds.
Join fan-in traits (Design 027): Runtime-agnostic abstraction for multi-input transform fan-in queues, replacing the previous tokio::sync::mpsc-only path in aimdb-core.
- JoinFanInRuntime trait — runtime capability for creating bounded fan-in queues; implemented per adapter.
- JoinQueue<T> trait — splittable into Sender / Receiver halves.
- JoinSender<T> / JoinReceiver<T> traits — async fn send / async fn recv returning ExecutorResult<()>.
ExecutorError::QueueClosed variant — returned by JoinSender::send / JoinReceiver::recv when the channel is closed (Tokio, WASM). Embassy channels never close, so this variant is unreachable on Embassy.