Logbook retention policies

Registered by Joshua Harlow

It would be nice to support a few basic logbook retention policies to avoid the continual cleanup required to discard irrelevant logbooks (and there associated flow details and task details contained in those logbooks).

A few that come to mind:
- delete individual flow detail/full logbook after success (aka, clear on/after certain states)
- expire logbook (or part of it) automatically after a given period of time (aka, TTL based)
- keep it forever, but place in a 'longer-term' storage, such as a remote directory (aka, move it)
- never keep anything (no persistence)
- keep just the last X entries

Blueprint information

Status:
Not started
Approver:
Joshua Harlow
Priority:
Medium
Drafter:
Joshua Harlow
Direction:
Approved
Assignee:
None
Definition:
Approved
Series goal:
None
Implementation:
Unknown
Milestone target:
None

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