Date comparison assserts

[Chemaclass]

📚 Description

Add date comparison assertions to bashunit, enabling tests to compare epoch-second timestamps. Five new assertions are introduced: assert_date_equals, assert_date_before, assert_date_after, assert_date_within_range, and assert_date_within_delta.

🔖 Changes

• Add new src/assert_dates.sh with five date comparison assertion functions
• Source assert_dates.sh from src/assertions.sh
• Add unit tests for all new assertions in tests/unit/assert_dates_test.sh
• Update CHANGELOG.md with the new feature

✅ To-do list

• I updated the CHANGELOG.md to reflect the new feature or fix
• I updated the documentation to reflect the changes

[github-actions]

✅ Contributor Report

User: @Chemaclass
Status: Passed (13/13 metrics passed)

Metric	Description	Value	Threshold	Status
PR Merge Rate	PRs merged vs closed	93%	>= 30%	✅
Repo Quality	Repos with ≥100 stars	6	>= 0	✅
Positive Reactions	Positive reactions received	155	>= 1	✅
Negative Reactions	Negative reactions received	0	<= 5	✅
Account Age	GitHub account age	4554 days	>= 30 days	✅
Activity Consistency	Regular activity over time	108%	>= 0%	✅
Issue Engagement	Issues with community engagement	0	>= 0	✅
Code Reviews	Code reviews given to others	174	>= 0	✅
Merger Diversity	Unique maintainers who merged PRs	7	>= 2	✅
Repo History Merge Rate	Merge rate in this repo	0.8823529411764706	>= 0	✅
Repo History Min PRs	Previous PRs in this repo	121	>= 0	✅
Profile Completeness	Profile richness (bio, followers)	100	>= 0	✅
Suspicious Patterns	Spam-like activity detection	0	N/A	✅

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_{Contributor Report evaluates based on public GitHub activity. Analysis period: 2025-02-06 to 2026-02-06}