Add a parameter `keep_failed` to `Dials.list_all()`,
specifying whether to return the paginated partial results
when an HTTP request fails.

Add a parameter `resume_from` to `Dials.list_all()`
to accept paginated partial results and resume the fetching.

Add a field `exception` to `PaginatedBaseModel`
to record the exception that causes the request to fail.

If applied, users would be able to write something like:
```python
data = None
data = dials.h1d.list_all(<filter>, keep_failed=True, resume_from=data)
```
and resume by <Up><Enter> from the terminal.

Add a parameter `keep_failed` to `Dials.list_all()`,
specifying whether to return the paginated partial results
when an HTTP request fails.

Add a parameter `resume_from` to `Dials.list_all()`
to accept paginated partial results and resume the fetching.

Add a field `exception` to `PaginatedBaseModel`
to record the exception that causes the request to fail.

If applied, users would be able to write something like:
```python
data = None
data = dials.h1d.list_all(<filter>, keep_failed=True, resume_from=data)
```
and resume by <Up><Enter> from the terminal.

…with format_exc

…tore exc as string

- In pydantic v1, model.schema() fails when using arbitrary types. More
info: pydantic/pydantic#4079
- Since exception as BaseException has no uses for now, we can safely
transform it to a string and also store the exc_type for future debug

- If we list an endpoint enforcing `max_pages`, we can return the last
`next` string and resume from there

…workspace