jif d77ebc7223 Cancel code mode timer tasks when cleared or the cell finishes (#45399) ...

## Why

Each `setTimeout` spawned a sleeping thread that remained alive until its delay elapsed, even after `clearTimeout` or cell completion.

## What changed

Replace per-timer threads with Tokio sleep tasks held by `AbortOnDropHandle`, so removing a timeout or dropping the isolate cancels its task. Enter the caller's Tokio runtime on the code mode runtime thread to support scheduling these timers.

## Testing

Add a regression test using virtual time to verify that cleared timers release their tasks, an awaited timer completes, and cell completion cancels remaining timers without emitting their output.

GitOrigin-RevId: 59c7e57ed226cb32633e2d4c25b778cfab2af423

2026-09-14 09:29:51 +00:00

..

cell_actor

Run code mode exclusively through the standalone host (#36217)

2026-07-30 20:24:29 +00:00

runtime

Cancel code mode timer tasks when cleared or the cell finishes (#45399)

2026-09-14 09:29:51 +00:00

session_runtime

Scope code mode callback delegates to individual executions (#44865)

2026-09-11 17:00:07 +00:00

lib.rs

Run code mode exclusively through the standalone host (#36217)

2026-07-30 20:24:29 +00:00

service_audio_tests.rs

Omit undersized WAV output from Code Mode (#41934)

2026-08-31 23:36:04 +00:00

service_contract_tests.rs

Scope code mode callback delegates to individual executions (#44865)

2026-09-11 17:00:07 +00:00

service_tests.rs

Scope code mode callback delegates to individual executions (#44865)

2026-09-11 17:00:07 +00:00

service.rs

Scope code mode callback delegates to individual executions (#44865)

2026-09-11 17:00:07 +00:00

v8_init.rs

Run code mode exclusively through the standalone host (#36217)

2026-07-30 20:24:29 +00:00