Feature #41 | Support date ranges for physical samples.

[gabrielakuhn]

Summary

Add the options of Date range in the "Dates" of physical sample.
Now only ranges carry an extra triple date_end. It is read as OPTIONAL
because only ranges dates carry one. This is written like in this way to
keep datetype for dates.

Changes

• src/djehuty/web/validator.py: Add partial_date_range_value, which returns
    the start and  the end of a range.
• src/djehuty/web/database.py: Store the end as a separate date_end, so each end
    keeps the datatype.
• src/djehuty/web/resources/sparql_templates/physical_sample_dates.sparql:
    Read date_end with OPTIONAL, because only ranges carry one.
• src/djehuty/web/xml_formatter.py: Join dates range with a slash for DataCite.
• src/djehuty/utils/convenience.py: Add convenience for day_first_date and date_or_range
    to render a date.
• src/djehuty/web/wsgi.py: Render date range for physical_sample.
• src/djehuty/web/resources/html_templates/depositor/edit-physical-sample.html:
    Add a Range tab to the date form.
• src/djehuty/web/resources/static/js/edit-physical-sample.js: Handle range tab.

Approval Checklist

• I agree to follow Djehuty's code of conduct.
• I have read and I have follow the code contribution workflow.
• Code style and conventions were respected.
• Documentation has been updated where needed (README, docs, or examples).
• Review approved by at least one maintainer.
• Merge readiness (PR is squashed into a single commit and follows the commit template).

Issue Reference

Part of #41

Screenshots

After

Notes
Forked from wip-feat-41-igsn-related-resources

[codecov]

Codecov Report

❌ Patch coverage is 13.11475% with 53 lines in your changes missing coverage. Please review.
✅ Project coverage is 16.30%. Comparing base (f695c96) to head (7222b10).

Files with missing lines	Patch %	Lines
src/djehuty/web/validator.py	8.10%	34 Missing ⚠️
src/djehuty/utils/convenience.py	27.27%	8 Missing ⚠️
src/djehuty/web/database.py	28.57%	5 Missing ⚠️
src/djehuty/web/xml_formatter.py	0.00%	4 Missing ⚠️
src/djehuty/web/wsgi.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@                          Coverage Diff                           @@
##           wip-feat-41-igsn-related-resources     #219      +/-   ##
======================================================================
- Coverage                               16.32%   16.30%   -0.03%     
======================================================================
  Files                                      21       21              
  Lines                                   11458    11504      +46     
  Branches                                 2249     2261      +12     
======================================================================
+ Hits                                     1871     1876       +5     
- Misses                                   9396     9437      +41     
  Partials                                  191      191              

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.