v0.48.0

Changelog

• 4b07b10 Release v0.48.0: contract revisions and sync diffs
• b0fd99a Merge pull request #52 from fluxinc/feat/contract-sync-state
• 93e73b4 Detect installed contract guidance drift on ordinary sync
• b35d01f Repair umbrella guidance an older writer left behind a current marker
• 353b69c Track contract revisions and reconcile pending guidance roots