Refresh uv.lock files (#20)

Ran uv lock --upgrade on the root project and the minimal_workspace scaffold.
Notable scaffold bumps: dlt 1.29.1 -> 1.30.0, dlthub 0.29.0 -> 0.30.0, starlette
1.3.1 -> 1.6.0, sqlglot 30.14 -> 30.17, setuptools 83.0 -> 84.0. Root bumps:
ast-serialize, librt, mypy, posthog, charset-normalizer, packaging. ruff stays
capped below 0.16. Added an [Unreleased] CHANGELOG entry for the scaffold refresh.

Author: bjoaquinc

CHANGELOG.md

@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Changed
+- Refreshed the bundled minimal workspace `uv.lock` to the latest within-constraint versions (notably `dlt` 1.29.1 → 1.30.0, `dlthub` 0.29.0 → 0.30.0, `starlette` 1.3.1 → 1.6.0, `sqlglot` 30.14 → 30.17, `setuptools` 83.0 → 84.0), plus transitive updates.
+
 ## [0.2.6] - 2026-08-04
 
 ### Changed