feat(toolkit): task dumps in recipes, bugfixes

[jlizen]

Adding a recipe to our agents toolkit for "what is a task waiting on?".

In the process I noticed some bugs, and also that our CI wasn't properly running our "check snippets" test. That would catch this sort of regression in the future.

[rcoh]

There are some surprising details about the timestamps, namely that they have the same pollstart as the poll that they follow

I'm not sure if the tooling just fully handles that for you or if agents will run into it

[jlizen]

Good point, i'll make it show the right thing out of box

[jlizen]

Yeah my new changes work fine:

    ╰ working_dir=/workplace/jlizen/dial9-tokio-telemetry
    Task 3 (examples/metrics-service/src/main.rs:220:14) idle 0.3ms awaiting: &mut F::poll
    future.rs:121
    Task 3 (examples/metrics-service/src/main.rs:220:14) idle 0.3ms awaiting:
    registration::Registration::poll_ready registration.rs:149
    Task 3 (examples/metrics-service/src/main.rs:220:14) idle 0.3ms awaiting:
    registration::Registration::poll_ready registration.rs:149
    Task 3 (examples/metrics-service/src/main.rs:220:14) idle 0.3ms awaiting: Sleep::poll
    sleep.rs:464
    Task 3 (examples/metrics-service/src/main.rs:220:14) idle 206.7ms awaiting: &mut F::poll
    future.rs:121
    ...+11 lines (ctrl+o to toggle)