Fix datetime_utils.parse accepting truncated datetimes

[TarunSinghChauhan]

Fixes #1349. The :00-append retry for hour-only UTC offsets was unguarded, so it also silently accepted truncated datetimes that should be rejected. Guarded the retry to only fire when the string ends in an hour-only offset ([+-]HH).

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• qdrant_client/local/datetime_utils.py

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📝 Walkthrough

Walkthrough

The local datetime parser now uses a regular expression to identify strings ending in signed two-digit hour offsets. It appends :00 and retries parsing only for those inputs. Other inputs that fail the normal formats return None, preventing truncated datetimes from being accepted.

Estimated code review effort: 2 (Simple) | ~10 minutes

Merge Risk: ⚪ Minimal · up to 605d7

This localized change restricts the datetime retry behavior to hour-only UTC offsets, with no actionable merge-blocking risk remaining beyond normal checks and review.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the primary change: preventing parse() from accepting truncated datetime strings.
Description check	✅ Passed	The description directly explains issue #1349 and the guard added for hour-only UTC offsets.
Linked Issues check	✅ Passed	The changes address [#1349] by limiting the ':00' retry to strings ending in an hour-only signed offset. This rejects truncated datetimes while preserving valid datetime and hour-only offset parsing.
Out of Scope Changes check	✅ Passed	The reported changes are limited to the datetime parsing fallback and its regular-expression guard. No unrelated changes are identified.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 1 files.

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