.fvmrc was updated to Flutter 3.44.1 in d7a9c2b but ci/main.go still
referenced 3.44.0. The version mismatch meant local dart format (3.44.1)
and CI dart format (3.44.0) could disagree, causing format-check failures
like the one in CI run #1449.
Also update the stale 3.41.6 version in the Graph() diagram.
Closes #383
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>