Codex P2 follow-up on PR #5684 (providers.py:104): the new OpenAI
denylist only stripped the modern `-YYYY-MM-DD` dated form, so
legacy compact snapshots like `gpt-3.5-turbo-0125`, `gpt-4-0613`,
`gpt-4-1106-preview`, and `gpt-4-0125-preview` slipped through. The
listing returns both the snapshot and the canonical id; the picker
should surface only the canonical so users do not accidentally
select a deprecated snapshot.
Extends the dated-suffix branch with `-\d{4}(?:-preview)?$` to
cover the compact `MMDD` form and the `-MMDD-preview` variant.
The new rule is anchored to the end of the id so canonical chat
ids whose minor version happens to be a year-like number
(`gpt-4.5`, `gpt-5.5`, `o3`) are unaffected.
Added `test_openai_legacy_compact_snapshot_suffixes_are_dropped`
to pin both sides (8 snapshot ids dropped, 7 canonical ids kept).
10 / 10 filter tests pass locally.
f5ace8824c