finalize afternoon planning operations about desisurvey

[schlafly]

We've been running afternoon planning for a while. Answering the bullets above:

• these are presently run manually. We may migrate to LO.
• we're wgetting from NERSC. We rely on offline pipeline assessments of tile and exposure completeness.
• we leave directories with AP state each night lying around, though these should be better organized. They are not archived or checked in anywhere, and it's not clear we want them to be, though important bits of them are (e.g., surveyops tile file).
• We're not currently generating nightly QA beyond "backup plans" that are posted to the wiki. Some visualization of these would be appropriate, as well as nightly completeness plots, etc., though things like desidash also cover some of this terrain.
• Information in real operations comes from the raw data stream, the ETC, and the offline pipeline completeness estimates.