Add `pformat_task()` beside `pformat_task_uid()` so diagnostics can
inspect an explicit endpoint, sibling or nursery-owning `trio.Task`.
Keep the current-task default and decimal head/tail identity format.
Preserve the `tractor.log` entry point with lazy forwarding, avoiding
eager debugger initialization during logging imports. Move the
existing formatting TODOs with the implementation.
Exercise real parent/child tasks without an actor, including coroutine
identity, nursery ownership and equivalent log/tooling UID output.
Prompt-IO: ai/prompt-io/20261021T145344Z_0553fcf8_task_format_prompt_io.md
Prompt-IO: ai/prompt-io/20261021T151133Z_0553fcf8_uid_move_prompt_io.md
(this patch was generated in some part by `opencode` using
`gpt-6.1-sol` (`openai`))
Gud Boi