Tomes that finish fast fail to respond when another task is blocking IO

[hulto]

Describe the bug
When a tome is performing an IO blocking operation like: sleeping, or making a network connection it can prevent other tomes from sending output back to tavern.
This only seems to affect tomes that finish quickly (likely within the time between claim_task and report.)
"fast" Tomes that have had this issue:

• Get env
• Shell execute cmd: id
• Process list match: *

/realm/implants/imix/src/agent.rs:78

    /*
     * Callback once using the configured client to claim new tasks and report available output.
     */
    pub async fn callback(&mut self) -> Result<()> {
        let transport = GRPC::new(self.cfg.callback_uri.clone(), self.cfg.proxy_uri.clone())?;
        self.claim_tasks(transport.clone()).await?;
        self.report(transport.clone()).await?;

        Ok(())
    }

To Reproduce

1. Create an IO blocking tome:

def main():
    time.sleep(999999)

main()

2. Import it to tavern - I temporarily replaced realm/tavern/tomes/example/main.eldritch with the above and the start tavern.
3. Run a "fast" tome to make sure it works
4. Run the IO blocking tome

5. Run a "fast" tome again and see how it stays in the Queued state

6. Run a slow tome and see that it finishes as expceted

Expected behavior
Tomes should never interfere with each other. Even if a tome is infinitely blocking other tomes should be able to complete.

[hulto]

Logs

Success case (slow execution)

 2024-04-19T00:29:41.178Z INFO  imix::agent             > callback complete (duration=0s, sleep=5s)
 2024-04-19T00:29:46.283Z INFO  imix::agent             > callback complete (duration=0s, sleep=5s)
 2024-04-19T00:29:51.385Z INFO  imix::agent             > callback complete (duration=0s, sleep=5s)
 2024-04-19T00:29:56.490Z INFO  imix::agent             > callback complete (duration=0s, sleep=5s)
 2024-04-19T00:30:01.492Z INFO  imix::agent             > 1 tasks claimed
 2024-04-19T00:30:01.492Z INFO  imix::agent             > spawned task execution for id=42949672965
 2024-04-19T00:30:01.493Z INFO  eldritch::runtime::eval > evaluating tome (task_id=42949672965)
 2024-04-19T00:30:01.693Z INFO  imix::agent             > callback complete (duration=0s, sleep=5s)
 2024-04-19T00:30:01.696Z INFO  imix::task              > message success (task_id=42949672965,msg=ReportAggOutput)
 2024-04-19T00:30:06.502Z INFO  eldritch::runtime::eval > tome evaluation successful (task_id=42949672965)
 2024-04-19T00:30:06.798Z INFO  imix::agent             > callback complete (duration=0s, sleep=5s)
 2024-04-19T00:30:06.801Z INFO  imix::task              > message success (task_id=42949672965,msg=ReportAggOutput)
 2024-04-19T00:30:11.901Z INFO  imix::agent             > callback complete (duration=0s, sleep=5s)
 2024-04-19T00:30:17.006Z INFO  imix::agent             > callback complete (duration=0s, sleep=5s)
 2024-04-19T00:30:22.109Z INFO  imix::agent             > callback complete (duration=0s, sleep=5s)

Failure case (fast execution)

 2024-04-19T00:30:47.631Z INFO  imix::agent             > callback complete (duration=0s, sleep=5s)
2024-04-19T00:30:52.736Z INFO  imix::agent             > callback complete (duration=0s, sleep=5s)
2024-04-19T00:30:57.839Z INFO  imix::agent             > callback complete (duration=0s, sleep=5s)
2024-04-19T00:31:02.842Z INFO  imix::agent             > 1 tasks claimed
2024-04-19T00:31:02.842Z INFO  imix::agent             > spawned task execution for id=42949672966
2024-04-19T00:31:02.842Z INFO  eldritch::runtime::eval > evaluating tome (task_id=42949672966)
2024-04-19T00:31:02.846Z INFO  eldritch::runtime::eval > tome evaluation successful (task_id=42949672966)
2024-04-19T00:31:02.942Z INFO  imix::agent             > callback complete (duration=0s, sleep=5s)
2024-04-19T00:31:08.048Z INFO  imix::agent             > callback complete (duration=0s, sleep=5s)
2024-04-19T00:31:13.150Z INFO  imix::agent             > callback complete (duration=0s, sleep=5s)
2024-04-19T00:31:18.254Z INFO  imix::agent             > callback complete (duration=0s, sleep=5s)
2024-04-19T00:31:23.357Z INFO  imix::agent             > callback complete (duration=0s, sleep=5s)