Attempt to fix bottlenecks and performance related to Facade

[MoralCode]

Description
This PR attempts to fix a couple non-normal conditions with regard to facade.

1. An instance that adds a lot of new repos at once can see existing repo recollections fall behind the configured window (because new repo collection currently takes priority)
2. an instance with a lot of repos that have collection errors can become severely bottlenecked and have keys potentially exhausted when ALL errored repos are reset to non-error states once a day by the error retry task.

These two issues can combine to grind collection to a halt and waste significant resources.

This PR addresses these issues by:

1. reserving half (or slightly less than half) of available collection slots for new collection (if needed), ensuring recollection jobs still have a path through the pipeline.
2. adjusting the error retry task so that it only resets errored repos when there are no new repos to collect.

when the errored repos (possibly a lot of them) get their status reset all at once, it causes a flood of collection tasks that are likely to fail again, thus potentially eating up API key usage when it might be needed for large tasks like new collection, contributing to slowness or bottlenecks.

This PR fixes #391

Notes for Reviewers

I still have yet to test this fully. itll probably be complicated to test

Signed commits

• Yes, I signed my commits.

Generative AI disclosure

Please select one option:

• This contribution was NOT assisted or created by Generative AI tools.
• This contribution was assisted or created by Generative AI tools.

If AI tools were used, please provide details below:
- What tools were used? Sonnet 4.6 Medium via Cursor
- How were these tools used? lots of back and forth to attempt to diagnose the general collection performance issues. Some AI code completion was used to write the code
- Did you review these outputs before submitting this PR? Yes, at all times I was making sure the AI tool's diagnosis was sensible given my knowledge of the code and all written code was looked at and understood by me.

[MoralCode]

yes i know this part of the code needs a rewrite

[github-actions]

[pylint] _{reported by reviewdog 🐶}
W0611: Unused import random (unused-import)

[MoralCode]

been testing this for a few days with the other high priority fixes. Haven't observed the errored repos get scheduled for recollection, but also havent observed the retry task get scheduled so this could just be me on a laptop (where the laptop being asleep overnight causes the task to never run)

[MoralCode]

observed the task run. it seemed to reset errored repos on my test instance (the collection monitor run after the reset picked up 2 core repos), but no repos have been added to this instance for a while so i think thats ok. the new code has been exercised and the un-run branch is just a log statement.