chore(release): v3.2.0 (#371)

* chore(release): v3.2.0

Bumps plugin/marketplace/codex/pyproject versions from 3.1.1 to 3.2.0.
Promotes the Unreleased CHANGELOG entries (--emit=html, Digg AI 1000
source) to the 3.2.0 release section.

* chore(release): bump SKILL.md header and sync.sh path to 3.2.0

---------

Co-authored-by: Matt Van Horn <455140+mvanhorn@users.noreply.github.com>

.codex-plugin/plugin.json

@@ -1,6 +1,6 @@
 {
   "name": "last30days",
-  "version": "3.1.1",
+  "version": "3.2.0",
   "description": "Research any topic across Reddit, X, YouTube, TikTok, Instagram, Hacker News, Polymarket, GitHub, and 5+ more sources. AI agent scores by upvotes, likes, and real money - not editors.",
   "author": {
     "name": "Matt Van Horn",