Update dependency peewee to v3.17.8

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
peewee	==3.17.5 -> ==3.17.8

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Release Notes

coleifer/peewee (peewee)

v3.17.8

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• Fix regression in behavior of delete_instance() when traversing nullable
  foreign-keys, #​2952. Introduced in 3.17.6. Recommended that you update.
• Fix bug where joins not cloned when going from join-less -> joined query,
  refs #​2941.

v3.17.7

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• Add db_url support for psycopg3 via psycopg3://.
• Ensure double-quotes are escaped properly when introspecting constraints.
• A few documentation-related fixes.

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v3.17.6

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• Fix bug in recursive model.delete_instance() when a table contains
  foreign-keys at multiple depths of the graph, #​2893.
• Fix regression in pool behavior on systems where time.time() returns
  identical values for two connections. This adds a no-op comparable sentinel
  to the heap to prevent any recurrence of this problem, #​2901.
• Ensure that subqueries inside CASE statements generate correct SQL.
• Fix regression that broke server-side cursors with Postgres (introduced in
  3.16.0).
• Fix to ensure compatibility with psycopg3 - the libpq TransactionStatus
  constants are no longer available on the Connection instance.
• Fix quoting issue in pwiz that could generate invalid python code for
  double-quoted string literals used as column defaults.

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