DataFusion 52 release post (#135)

* Initial draft (coded with codex)

* updates

* updates

* Update sql planning

* Apply suggestions from code review

Co-authored-by: Matt Butrovich <mbutrovich@users.noreply.github.com>

* Updates

* acknowledgments

* update

* updates

* update

* typos

* refine

* clean

* Update content/blog/2026-01-08-datafusion-52.0.0.md

Co-authored-by: Martin Grigorov <martin-g@users.noreply.github.com>

* Clarify RelationPlanner syntax

* remove extra section

* Update content/blog/2026-01-08-datafusion-52.0.0.md

Co-authored-by: Adrian Garcia Badaracco <1755071+adriangb@users.noreply.github.com>

* Refine wording

* reflow

* Metadata cache is general

* Add section on Min/max dynamic filters

* Update content/blog/2026-01-08-datafusion-52.0.0.md

Co-authored-by: Yongting You <2010youy01@gmail.com>

* whitespace

* Improve sort pushdown description

* capitalizaton

* wordsmith

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Co-authored-by: Matt Butrovich <mbutrovich@users.noreply.github.com>
Co-authored-by: Martin Grigorov <martin-g@users.noreply.github.com>
Co-authored-by: Adrian Garcia Badaracco <1755071+adriangb@users.noreply.github.com>
Co-authored-by: Yongting You <2010youy01@gmail.com>

Author: 5 people