ENH: infer Timestamp(iso8601string) resolution
- [ ] closes #xxxx (Replace xxxx with the GitHub issue number)
- [ ] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [ ] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit).
- [ ] Added [type annotations](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#type-hints) to new arguments/methods/functions.
- [ ] Added an entry in the latest `doc/source/whatsnew/vX.X.X.rst` file if fixing a bug or adding a new feature.

> Looks pretty good. Do we have any tests where the iso string has a UTC offset?

im pretty sure we have loads of these, unless we're thinking of different things.  you mean like "2016-01-01 04:05:06-01:00" right? > > Looks pretty good. Do we have any tests where the iso string has a UTC offset?
> 
> im pretty sure we have loads of these, unless we're thinking of different things. you mean like "2016-01-01 04:05:06-01:00" right?

Yeah exactly. Should those test assert that the resolution is a certain value too? looks good - merging then, thanks @jbrockmendel !