Exceptions during alignment intake should trigger admin email

[ressy]

Currently if an exception is raised during task processing, IlluminaProcessor._worker will catch it and send an email to the address defined in to_addrs_on_error in the config. The same should happen if an exception reaches _proc_new_alignment, possibly also including what's currently caught in ProjectData.from_alignment for any problems when loading metadata. (Possibly just remove the except clause there and handle within IlluminaProcessor.)

[ressy]

There are actually a few distinct cases here:

1. exception during the initial experiment metadata parsing, before individual projects are recognized. This (any exception) is currently caught and logged as a critical error. There's no specific project to reference at this point but a message could still be sent.
2. exception during ProjectData initialization itself while looping over however many projects per experiment. This is not caught anywhere as far as I can see (so I think this would still crash the whole thing if it came up).
3. exception while defining sample paths for any one project while in that loop. This (only recognized exceptions related to sample/file mismatches) is caught and logged as a critical (no, just error level) error. I think this is the case I was originally thinking of here.

Instead of passing around a reference to the email setup wherever it might be needed, maybe the best approach would be to configure a secondary log handler for messages above a particular log level and handle it all in one place. Then the catching and logging during project setup could stay the same.