CRAN release v0.3.1

[krlmlr]

Action items

• Groom NEWS.md and cran-comments.md
• Wait for successful tests
• If needed, tweak and review PR
• Run fledge::release()
• Confirm CRAN e-mail
• When the package is accepted on CRAN, run fledge::post_release() (often handled by GitHub Actions)

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 55.12821% with 35 lines in your changes are missing coverage. Please review.

Project coverage is 9.67%. Comparing base (4bd930c) to head (fd263cb).

❗ Current head fd263cb differs from pull request most recent head b78de59. Consider uploading reports for the commit b78de59 to get more accurate results

Files	Patch %	Lines
R/fallback.R	23.07%	10 Missing ⚠️
R/telemetry.R	70.58%	5 Missing ⚠️
R/group_map.R	0.00%	4 Missing ⚠️
R/group_modify.R	0.00%	4 Missing ⚠️
R/group_split.R	0.00%	4 Missing ⚠️
R/relational-duckdb.R	55.55%	4 Missing ⚠️
R/relational.R	83.33%	3 Missing ⚠️
R/meta.R	0.00%	1 Missing ⚠️

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Additional details and impacted files

@@           Coverage Diff            @@
##            main    #118      +/-   ##
========================================
- Coverage   9.72%   9.67%   -0.06%     
========================================
  Files        129     127       -2     
  Lines      22646   22614      -32     
========================================
- Hits        2202    2187      -15     
+ Misses     20444   20427      -17     

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